Friarspam
Posts:
12,363
Registered:
Jan 23, '07
Extended Info (if available)
Real Post Cnt: 10,619
User ID: 1,200,702
|
Subject:
Math question
|
ok, let's say a bucket of water weighs 40 lbs. What, if any would the bucket weigh on a 20 ft rope?
Thx in advance.
-----signature-----
My folks went on vacation and all I got was this lousy sig.
|
|
Link to this post
|
ZartanAround
Title: Torpid Curmudgeon
Posts:
13,775
Registered:
Feb 6, '04
Extended Info (if available)
Real Post Cnt: 11,365
User ID: 892,117
|
Subject:
Math question
|
my guess is 40lbs.
are you leaving out information?
[EDIT] technically this is a statics/dynamics question, not a math question.
-----signature-----
what are nice chickens like you doing in a coop like this?
|
|
Link to this post
|
ZigmundZag
Title: Grammar Nazi
Posts:
25,948
Registered:
Mar 25, '02
Extended Info (if available)
Real Post Cnt: 22,707
User ID: 661,552
|
Subject:
Math question
|
|
The weight doesn't change (unless you mean it's now the weight of the bucket + the 20' of rope). The amount of force required to move the bucket may change if there's a pulley involved, but like Zartan said there's missing information if that's the case.
-----signature-----
"Take the cheese to sickbay!"
|
|
Link to this post
|
__Bonk__
Posts:
53,947
Registered:
Jul 25, '09
Extended Info (if available)
Real Post Cnt: 53,339
User ID: 1,364,654
|
Subject:
Math question
|
A DUCK
-----signature-----
I keep my eyes fixed on the sun!
A change in feeling is a change in destiny.
|
|
Link to this post
|
Walker_ID
Posts:
24,809
Registered:
May 29, '02
Extended Info (if available)
Real Post Cnt: 23,164
User ID: 683,720
|
Subject:
Math question
|
|
it depends on how the bucket is interacting with the rope and where the bucket is in relation to other things
-----signature-----
You can't outrun Darwin
|
|
Link to this post
|
Friarspam
Posts:
12,363
Registered:
Jan 23, '07
Extended Info (if available)
Real Post Cnt: 10,619
User ID: 1,200,702
|
Subject:
Math question
|
uh....let's say the amont of force to raise the bucket. With/if there is a change how would that be expressed such as:
if it started at "1" and changed to"5" would it be like saying it was 200lb-I know that is not right but that's the idea of what I'm asking
-----signature-----
My folks went on vacation and all I got was this lousy sig.
|
|
Link to this post
|
Walker_ID
Posts:
24,809
Registered:
May 29, '02
Extended Info (if available)
Real Post Cnt: 23,164
User ID: 683,720
|
Subject:
Math question
|
Friarspam posted:
uh....let's say the amont of force to raise the bucket. With/if there is a change how would that be expressed such as:
if it started at "1" and changed to"5" would it be like saying it was 200lb-I know that is not right but that's the idea of what I'm asking
1 what? newton?
-----signature-----
You can't outrun Darwin
|
|
Link to this post
|
ZartanAround
Title: Torpid Curmudgeon
Posts:
13,775
Registered:
Feb 6, '04
Extended Info (if available)
Real Post Cnt: 11,365
User ID: 892,117
|
Subject:
Math question
|
you clearly don't even understand the question that you're asking.
how can you possibly evaluate a response accurately?
-----signature-----
what are nice chickens like you doing in a coop like this?
|
|
Link to this post
|
ZartanAround
Title: Torpid Curmudgeon
Posts:
13,775
Registered:
Feb 6, '04
Extended Info (if available)
Real Post Cnt: 11,365
User ID: 892,117
|
Subject:
Math question
|
friar, sorry bud, but you are dumber than a $3 bill in Atlantic City.
if i took a 80lb bucket of jellyfish poop and hung it from a 40ft cable, it would be smarter than you.
-----signature-----
what are nice chickens like you doing in a coop like this?
|
|
Link to this post
|
Friarspam
Posts:
12,363
Registered:
Jan 23, '07
Extended Info (if available)
Real Post Cnt: 10,619
User ID: 1,200,702
|
Subject:
Math question
|
Jesus
/simplification inc
Lifting a 40 lb bucket is like lifting X amount when it's on a 20 ft rope (with no pulley).
-----signature-----
My folks went on vacation and all I got was this lousy sig.
|
|
Link to this post
|
Walker_ID
Posts:
24,809
Registered:
May 29, '02
Extended Info (if available)
Real Post Cnt: 23,164
User ID: 683,720
|
Subject:
Math question
|
|
it's changes as you lift it
-----signature-----
You can't outrun Darwin
|
|
Link to this post
|
ZartanAround
Title: Torpid Curmudgeon
Posts:
13,775
Registered:
Feb 6, '04
Extended Info (if available)
Real Post Cnt: 11,365
User ID: 892,117
|
Subject:
Math question
|
don't act like a martyr dooshbag.
you simply didn't provide enough information to get a correct answer.
infact, i am CERTAIN that you don't even understand the question that you're asking.
either way, wtf do you care what the answer is?
at this rate your'd be better off hanging yourself with that 20ft rope.
-----signature-----
what are nice chickens like you doing in a coop like this?
|
|
Link to this post
|
eodoll
Posts:
17,153
Registered:
Feb 14, '02
Extended Info (if available)
Real Post Cnt: 15,943
User ID: 645,592
|
Subject:
Math question
|
|
Are you referring to leverage? The bucket weighs the same no matter where you put it or what you use to lift it.
-----signature-----
(none)
|
|
Link to this post
|
Friarspam
Posts:
12,363
Registered:
Jan 23, '07
Extended Info (if available)
Real Post Cnt: 10,619
User ID: 1,200,702
|
Subject:
Math question
|
ZartanAround posted:
don't act like a martyr dooshbag.
you simply didn't provide enough information to get a correct answer.
infact, i am CERTAIN that you don't even understand the question that you're asking.
either way, wtf do you care what the answer is?
at this rate your'd be better off hanging yourself with that 20ft rope.
My 80 some odd year old uncle drew water from a well with a rope, that's WHY I'd like to know. He did this a lot over a z year period.
i'm guessing you must not know either since you haven't answered the question.
-----signature-----
My folks went on vacation and all I got was this lousy sig.
|
|
Link to this post
|
Walker_ID
Posts:
24,809
Registered:
May 29, '02
Extended Info (if available)
Real Post Cnt: 23,164
User ID: 683,720
|
Subject:
Math question
|
eodoll posted:
Are you referring to leverage? The bucket weighs the same no matter where you put it or what you use to lift it.
it weighs the same yes...but i think hes talking about work/power used to move the bucket which "feels" different in weight as you move it
-----signature-----
You can't outrun Darwin
|
|
Link to this post
|
Groucho48
Posts:
11,206
Registered:
Oct 22, '03
Extended Info (if available)
Real Post Cnt: 11,136
User ID: 847,611
|
Subject:
Math question
|
If you are asking about foot-pounds, that should be easy enough to figure out a rough answer for. If there was some kind of pulley system, that might make things more complicated.
-----signature-----
“Science is like sex: sometimes something useful comes out, but that is not the reason we are doing it.†– Richard Feynman
|
|
Link to this post
|
Friarspam
Posts:
12,363
Registered:
Jan 23, '07
Extended Info (if available)
Real Post Cnt: 10,619
User ID: 1,200,702
|
Subject:
Math question
|
Walker_ID posted:
eodoll posted:
Are you referring to leverage? The bucket weighs the same no matter where you put it or what you use to lift it.
it weighs the same yes...but i think hes talking about work/power used to move the bucket which "feels" different in weight as you move it
Exactly, how much would it "feel" like was being lifted.
-----signature-----
My folks went on vacation and all I got was this lousy sig.
|
|
Link to this post
|
ZartanAround
Title: Torpid Curmudgeon
Posts:
13,775
Registered:
Feb 6, '04
Extended Info (if available)
Real Post Cnt: 11,365
User ID: 892,117
|
Subject:
Math question
|
Friarspam posted:
ZartanAround posted:
don't act like a martyr dooshbag.
you simply didn't provide enough information to get a correct answer.
infact, i am CERTAIN that you don't even understand the question that you're asking.
either way, wtf do you care what the answer is?
at this rate your'd be better off hanging yourself with that 20ft rope.
My 80 some odd year old uncle drew water from a well with a rope, that's WHY I'd like to know. He did this a lot over a z year period.
i'm guessing you must not know either since you haven't answered the question.
your question is "What, if any would the bucket weigh on a 20 ft rope?"
essentially, everything that you have posted is nonsense...
my initial response of 40lbs is correct.
i will stand by this.
-----signature-----
what are nice chickens like you doing in a coop like this?
|
|
Link to this post
|
Walker_ID
Posts:
24,809
Registered:
May 29, '02
Extended Info (if available)
Real Post Cnt: 23,164
User ID: 683,720
|
Subject:
Math question
|
Friarspam posted:
Walker_ID posted:
eodoll posted:
Are you referring to leverage? The bucket weighs the same no matter where you put it or what you use to lift it.
it weighs the same yes...but i think hes talking about work/power used to move the bucket which "feels" different in weight as you move it
Exactly, how much would it "feel" like was being lifted.
have another wiz do it...the sloshing of the water alone would make the calculation too irritating for me ...i haven't done a physics calculation in nearly 2 decades
-----signature-----
You can't outrun Darwin
|
|
Link to this post
|
ZartanAround
Title: Torpid Curmudgeon
Posts:
13,775
Registered:
Feb 6, '04
Extended Info (if available)
Real Post Cnt: 11,365
User ID: 892,117
|
Subject:
Math question
|
40lbs is 40lbs. it doesn't matter if it's dangling from a well or a 1000story sky skyscraper.
-----signature-----
what are nice chickens like you doing in a coop like this?
|
|
Link to this post
|
Sezyrrith
Posts:
6,166
Registered:
Jul 13, '03
Extended Info (if available)
Real Post Cnt: 5,959
User ID: 821,875
|
Subject:
Math question
|
Friarspam posted:
Walker_ID posted:
eodoll posted:
Are you referring to leverage? The bucket weighs the same no matter where you put it or what you use to lift it.
it weighs the same yes...but i think hes talking about work/power used to move the bucket which "feels" different in weight as you move it
Exactly, how much would it "feel" like was being lifted.
Unless I'm misunderstanding the nature of the question, F=MD, or force = mass * distance. We'd have to know the distance from the water to the surface to have an accurate answer.
That's assuming that the weight of the rope is negligible, otherwise you'd have to use integration to find the rope's contribution to the lifting force.
[Edit:]And assuming he's manually lifting it, not using a winch (which almost every well I've seen has).
[Edit2:]20 foot drop, see it now in the OP. 40lb bucket - that's a big bucket. 5 gallons weighs 40 lbs, so it's at least 4 gallons contained in a heavy bucket. You sure that's what it weighed?
-----signature-----
E- 80% K- 60% S- 40% A- 20% "That thing you burnt up isn't important to me. It's the fluid catalytic cracking unit. It made shoes for orphans. Nice job breaking it, hero." http://tinyurl.com/Sezy-1
|
|
Link to this post
|
ZartanAround
Title: Torpid Curmudgeon
Posts:
13,775
Registered:
Feb 6, '04
Extended Info (if available)
Real Post Cnt: 11,365
User ID: 892,117
|
Subject:
Math question
|
it sounds to me like you are more interested in how much WORK was done, but i doubt that you'd understand that either.
-----signature-----
what are nice chickens like you doing in a coop like this?
|
|
Link to this post
|
Friarspam
Posts:
12,363
Registered:
Jan 23, '07
Extended Info (if available)
Real Post Cnt: 10,619
User ID: 1,200,702
|
Subject:
Math question
|
Sloshing water?? Call it a cocrete block then I'm just curious what the weight would seem like it weighed over that distance in general terms.
/sorry for not asking clearly enough before.
-----signature-----
My folks went on vacation and all I got was this lousy sig.
|
|
Link to this post
|
eodoll
Posts:
17,153
Registered:
Feb 14, '02
Extended Info (if available)
Real Post Cnt: 15,943
User ID: 645,592
|
Subject:
Math question
|
|
If its just a rope attached to an object and no pulley then its still 40lbs. If you have pulleys to manage the force anddistribute tension then it can if configured properly feel very light.
-----signature-----
(none)
|
|
Link to this post
|
Sezyrrith
Posts:
6,166
Registered:
Jul 13, '03
Extended Info (if available)
Real Post Cnt: 5,959
User ID: 821,875
|
Subject:
Math question
|
ZartanAround posted:
it sounds to me like you are more interested in how much WORK was done, but i doubt that you'd understand that either.
Yeah, I think he's looking for work done in ft-lbs.
-----signature-----
E- 80% K- 60% S- 40% A- 20% "That thing you burnt up isn't important to me. It's the fluid catalytic cracking unit. It made shoes for orphans. Nice job breaking it, hero." http://tinyurl.com/Sezy-1
|
|
Link to this post
|
Walker_ID
Posts:
24,809
Registered:
May 29, '02
Extended Info (if available)
Real Post Cnt: 23,164
User ID: 683,720
|
Subject:
Math question
|
ZartanAround posted:
40lbs is 40lbs. it doesn't matter if it's dangling from a well or a 1000story sky skyscraper.
we've already established he was talking about work and not strictly weight
and your statement isn't true in any case....weight changes based on the distance between the center of the objects in question....the further apart they are the less they weigh...the change in weight might be minuscule but there is a change
-----signature-----
You can't outrun Darwin
|
|
Link to this post
|
Walker_ID
Posts:
24,809
Registered:
May 29, '02
Extended Info (if available)
Real Post Cnt: 23,164
User ID: 683,720
|
Subject:
Math question
|
Friarspam posted:
Sloshing water?? Call it a cocrete block then I'm just curious what the weight would seem like it weighed over that distance in general terms.
/sorry for not asking clearly enough before.
concrete blocks sway back and forth as you raise them just like water 
-----signature-----
You can't outrun Darwin
|
|
Link to this post
|
ZartanAround
Title: Torpid Curmudgeon
Posts:
13,775
Registered:
Feb 6, '04
Extended Info (if available)
Real Post Cnt: 11,365
User ID: 892,117
|
Subject:
Math question
|
yes i agree, he is differentiating between how much something weighs and how
much it "feels" like it weighs.... minuscule.
-----signature-----
what are nice chickens like you doing in a coop like this?
|
|
Link to this post
|
Koneg
Title: Evil Genius
Posts:
31,388
Registered:
Dec 4, '01
Extended Info (if available)
Real Post Cnt: 28,579
User ID: 530,943
|
Subject:
Math question
|
ZartanAround posted:
40lbs is 40lbs. it doesn't matter if it's dangling from a well or a 1000story sky skyscraper.
This.
Why the fark is this even a question?
-----signature-----
* First rule of a gun fight: Have a gun.
|
"Any sufficiently advanced idiocy is
indistinguishable from trolling." -- Arthur C Clarke
|
|
Link to this post
|
eodoll
Posts:
17,153
Registered:
Feb 14, '02
Extended Info (if available)
Real Post Cnt: 15,943
User ID: 645,592
|
Subject:
Math question
|
|
Well if you have a 40lb object on one end, then what weight object woukd you need on the other to balance the weight? Thats prob what hes asking.
-----signature-----
(none)
|
|
Link to this post
|
ZartanAround
Title: Torpid Curmudgeon
Posts:
13,775
Registered:
Feb 6, '04
Extended Info (if available)
Real Post Cnt: 11,365
User ID: 892,117
|
Subject:
Math question
|
despite the fact that you've put it in a meaningful context,
i still doubt that friar ever had any idea what it was he is asking.
-----signature-----
what are nice chickens like you doing in a coop like this?
|
|
Link to this post
|
Walker_ID
Posts:
24,809
Registered:
May 29, '02
Extended Info (if available)
Real Post Cnt: 23,164
User ID: 683,720
|
Subject:
Math question
|
ZartanAround posted:
yes i agree, he is differentiating between how much something weighs and how
much it "feels" like it weighs.... minuscule.
nah...the weight of a car is pretty big...but the force to move it makes it feel much lighter than it is (thanks to wheels)
the difference in weight and how hard something is to move(feeling lighter) can be huge depending on many variables....the whole objects in motion crap and all the other physics argle blargle i'm not going to attempt to recall this late at night
-----signature-----
You can't outrun Darwin
|
|
Link to this post
|
eodoll
Posts:
17,153
Registered:
Feb 14, '02
Extended Info (if available)
Real Post Cnt: 15,943
User ID: 645,592
|
Subject:
Math question
|
It made more sense when he mentioned pulling the bucket from he well.
Edit: the concept of jacks always amazes me, how you can lift something so heavy with a simple twist of a bolt.
-----signature-----
(none)
|
|
Link to this post
|
Groucho48
Posts:
11,206
Registered:
Oct 22, '03
Extended Info (if available)
Real Post Cnt: 11,136
User ID: 847,611
|
Subject:
Math question
|
If it is at the end of a long rope and it starts swinging around, that might make it seem heavier. Because some of your lifting power is being used for horizontal movement rather than all of it going to vertical movement. Other than that, except for a minimal decrease in gravity as it moves upward, 40 pounds is 40 pounds.
-----signature-----
“Science is like sex: sometimes something useful comes out, but that is not the reason we are doing it.†– Richard Feynman
|
|
Link to this post
|
Sea_of_inK
Posts:
3,238
Registered:
Oct 18, '04
Extended Info (if available)
Real Post Cnt: 2,898
User ID: 978,446
|
Subject:
Math question
|
lol
since I don't see it mentioned..
I think the weight of the rope would make a difference. It would make the weight more than 40lbs, but should lessen as you pull the rope toward you and drop the slack.
-----signature-----
|
|
Link to this post
|
Koneg
Title: Evil Genius
Posts:
31,388
Registered:
Dec 4, '01
Extended Info (if available)
Real Post Cnt: 28,579
User ID: 530,943
|
Subject:
Math question
|
Walker_ID posted:
and your statement isn't true in any case....weight changes based on the distance between the center of the objects in question....the further apart they are the less they weigh...the change in weight might be minuscule but there is a change
Hola Crap. I could actually feel the brain cells die as I read that. 
40lb bucket 2" off the ground or at the end of a 1000 foot rope still weighs exactly 40 pounds. The weight will not change unless and until you change the force of gravity. That won't happen until you get at least 5 miles up, and even then you're talking about a reduction of less than one half of one percent of the weight due to increased altitude.
Walker_ID posted:
nah...the weight of a car is pretty big...but the force to move it makes it feel much lighter than it is (thanks to wheels)
the difference in weight and how hard something is to move(feeling lighter) can be huge depending on many variables....the whole objects in motion crap and all the other physics argle blargle i'm not going to attempt to recall this late at night
All that "argle blargle" is referring to inertia, and how much energy is required to overcome it.
That has nothing to do with the weight of the bucket, because 40 pounds is 40 gawd damn pounds.
-----signature-----
* First rule of a gun fight: Have a gun.
|
"Any sufficiently advanced idiocy is
indistinguishable from trolling." -- Arthur C Clarke
|
|
Link to this post
|
ZartanAround
Title: Torpid Curmudgeon
Posts:
13,775
Registered:
Feb 6, '04
Extended Info (if available)
Real Post Cnt: 11,365
User ID: 892,117
|
Subject:
Math question
|
Walker_ID posted:
ZartanAround posted:
yes i agree, he is differentiating between how much something weighs and how
much it "feels" like it weighs.... minuscule.
nah...the weight of a car is pretty big...but the force to move it makes it feel much lighter than it is (thanks to wheels)
the difference in weight and how hard something is to move(feeling lighter) can be huge depending on many variables....the whole objects in motion crap and all the other physics argle blargle i'm not going to attempt to recall this late at night
now there is a car involved? are you on drugs?
-----signature-----
what are nice chickens like you doing in a coop like this?
|
|
Link to this post
|
Friarspam
Posts:
12,363
Registered:
Jan 23, '07
Extended Info (if available)
Real Post Cnt: 10,619
User ID: 1,200,702
|
Subject:
Math question
|
ok I can see that either I'm not being clear on what I want to know or we're moving down assinine highway so I'll try again:
If a given weight is lifted straight up how much does the weight appear to the person doing the lifting?
Example: 40 lb lifted from the surface of the weight -vs- 40 lb lifted feom 20 foot.
now, I know that 40 lbs does not "change", but how much does it FEEl like is being moved. Also, before someone asks, I don't know the elevation, barometeic pressure, temperature and the rope is magic and weighs nothing for the purpose of this question.
/this thread is like trolling myself lol
-----signature-----
My folks went on vacation and all I got was this lousy sig.
|
|
Link to this post
|
eodoll
Posts:
17,153
Registered:
Feb 14, '02
Extended Info (if available)
Real Post Cnt: 15,943
User ID: 645,592
|
Subject:
Math question
|
|
Lol i dontthink he means 20 ft high.
-----signature-----
(none)
|
|
Link to this post
|
ZartanAround
Title: Torpid Curmudgeon
Posts:
13,775
Registered:
Feb 6, '04
Extended Info (if available)
Real Post Cnt: 11,365
User ID: 892,117
|
Subject:
Math question
|
Koneg posted:
Walker_ID posted:
and your statement isn't true in any case....weight changes based on the distance between the center of the objects in question....the further apart they are the less they weigh...the change in weight might be minuscule but there is a change
Hola Crap. I could actually feel the brain cells die as I read that.
40lb bucket 2" off the ground or at the end of a 1000 foot rope still weighs exactly 40 pounds. The weight will not change unless and until you change the force of gravity. That won't happen until you get at least 5 miles up, and even then you're talking about a reduction of less than one half of one percent of the weight due to increased altitude.
Walker_ID posted:
nah...the weight of a car is pretty big...but the force to move it makes it feel much lighter than it is (thanks to wheels)
the difference in weight and how hard something is to move(feeling lighter) can be huge depending on many variables....the whole objects in motion crap and all the other physics argle blargle i'm not going to attempt to recall this late at night
All that "argle blargle" is referring to inertia, and how much energy is required to overcome it.
That has nothing to do with the weight of the bucket, because 40 pounds is 40 gawd damn pounds.
this.
metal face to the rescue. 
-----signature-----
what are nice chickens like you doing in a coop like this?
|
|
Link to this post
|
ZartanAround
Title: Torpid Curmudgeon
Posts:
13,775
Registered:
Feb 6, '04
Extended Info (if available)
Real Post Cnt: 11,365
User ID: 892,117
|
Subject:
Math question
|
Friarspam posted:
ok I can see that either I'm not being clear on what I want to know or we're moving down assinine highway so I'll try again:
If a given weight is lifted straight up how much does the weight appear to the person doing the lifting?
Example: 40 lb lifted from the surface of the weight -vs- 40 lb lifted feom 20 foot.
now, I know that 40 lbs does not "change", but how much does it FEEl like is being moved. Also, before someone asks, I don't know the elevation, barometeic pressure, temperature and the rope is magic and weighs nothing for the purpose of this question.
/this thread is like trolling myself lol
40lbs FEELS EXACTLY LIKE 40lbs!!!
-----signature-----
what are nice chickens like you doing in a coop like this?
|
|
Link to this post
|
ZartanAround
Title: Torpid Curmudgeon
Posts:
13,775
Registered:
Feb 6, '04
Extended Info (if available)
Real Post Cnt: 11,365
User ID: 892,117
|
Subject:
Math question
|
next time i move, friar will be the first person i call.
-----signature-----
what are nice chickens like you doing in a coop like this?
|
|
Link to this post
|
eodoll
Posts:
17,153
Registered:
Feb 14, '02
Extended Info (if available)
Real Post Cnt: 15,943
User ID: 645,592
|
Subject:
Math question
|
Its going to weigh 40lbs no matter how long the rope is.
You will not get a mechanical advatange until you had something extra to it.
The only benefit of a long rope is more people can grab it to help pull it.
-----signature-----
(none)
|
|
Link to this post
|
MayorShade
Title: Not Special Forces
Posts:
2,361
Registered:
Mar 1, '04
Extended Info (if available)
Real Post Cnt: 2,064
User ID: 900,170
|
Subject:
Math question
|
|
After I read this thread I went and dug up my old engineering physics textbook, and then I went and beat a homeless man with it.
-----signature-----
"drive a SUV and have a Apple straped to your azz" - Blue_Arrow
"You guys know that I love homosexuals." - GrilledCheez
|
|
Link to this post
|
Walker_ID
Posts:
24,809
Registered:
May 29, '02
Extended Info (if available)
Real Post Cnt: 23,164
User ID: 683,720
|
Subject:
Math question
|
Koneg posted:
Walker_ID posted:
and your statement isn't true in any case....weight changes based on the distance between the center of the objects in question....the further apart they are the less they weigh...the change in weight might be minuscule but there is a change
Hola Crap. I could actually feel the brain cells die as I read that.
40lb bucket 2" off the ground or at the end of a 1000 foot rope still weighs exactly 40 pounds. The weight will not change unless and until you change the force of gravity. That won't happen until you get at least 5 miles up, and even then you're talking about a reduction of less than one half of one percent of the weight due to increased altitude.
i'm not surprised when confronted with facts that your brain cells cease to function
even simply weighing your self on/near the equator as opposed to one of the poles alone will net you a pound depending on your weight
and i'm not sure which part of "minuscule" escaped you
any distance decreases weight...and i don't know what education system you ascribe to but here in the real world x - y =/ exactly x assuming both are > 0
-----signature-----
You can't outrun Darwin
|
|
Link to this post
|
illmyrin
Posts:
16,612
Registered:
Dec 25, '01
Extended Info (if available)
Real Post Cnt: 10,815
User ID: 574,488
|
Subject:
Math question
|
|
The effect of the weight is directly related to the muscles involved. Lifting a 40 lb bucket of water in with one arm is a lot easier than pulling the same bucked up with a rope.
-----signature-----
Hold up your opinions and I'll tell you which one is my favorit.
|
|
Link to this post
|
Walker_ID
Posts:
24,809
Registered:
May 29, '02
Extended Info (if available)
Real Post Cnt: 23,164
User ID: 683,720
|
Subject:
Math question
|
Koneg posted:
]All that "argle blargle" is referring to inertia, and how much energy is required to overcome it.
That has nothing to do with the weight of the bucket, because 40 pounds is 40 gawd damn pounds.
did yuki pass on his torch to you today? that's twice now you've spouted nonsense that has nothing to do with whats being said
-----signature-----
You can't outrun Darwin
|
|
Link to this post
|
Yukishiro1
Posts:
38,362
Registered:
Sep 20, '02
Extended Info (if available)
Real Post Cnt: 31,453
User ID: 718,633
|
Subject:
Math question
|
|
this thread isn't over until Sweeney posts in it
-----signature-----
(none)
|
|
Link to this post
|
ZartanAround
Title: Torpid Curmudgeon
Posts:
13,775
Registered:
Feb 6, '04
Extended Info (if available)
Real Post Cnt: 11,365
User ID: 892,117
|
Subject:
Math question
|
Retards posted:
in redneck country, 40lbs weighs a helluva lot more than 40lbs
-----signature-----
what are nice chickens like you doing in a coop like this?
|
|
Link to this post
|
Friarspam
Posts:
12,363
Registered:
Jan 23, '07
Extended Info (if available)
Real Post Cnt: 10,619
User ID: 1,200,702
|
Subject:
Math question
|
illmyrin posted:
The effect of the weight is directly related to the muscles involved. Lifting a 40 lb bucket of water in with one arm is a lot easier than pulling the same bucked up with a rope.
That's exactly the point I'm wondering. How much does the perception of the amount of weight make it seem like is being lifted.
-----signature-----
My folks went on vacation and all I got was this lousy sig.
|
|
Link to this post
|
Eternal_Midnight
Posts:
19,580
Registered:
May 11, '00
Extended Info (if available)
Real Post Cnt: 15,756
User ID: 24,262
|
Subject:
Math question
|
Friarspam posted:
That's exactly the point I'm wondering. How much does the perception of the amount of weight make it seem like is being lifted.
'Perception of the amount of weight' is pretty much nonsense, because that would depends on just how strong the person is. 40lbs feels like a lot to a little girl, and like nothing to a weightlifter. How it 'feels' would also depend on how it's being lifted: one a point, or spread across a bar, say. So the 40lbs 'feels' like a lot more if you used only your rope, versus if you spread the force of gravity pulling on the bucket over a solid steel bar, and then lifted the bar. This is because the load is either all on a single spot, or spread out over an area.
Consider the weight of your body when you stand flat on your feet, versus standing on your toes. You 'feel' a lot heavier, even though you weigh exactly the same.
It's still 40lbs, and that never changes on the scale you are referring to. What you are really asking is entirely subjective, and pretty stupid.
-----signature-----
We have not inherited the Earth from our parents, we have borrowed it from our children.
|
|
Link to this post
|
MayorShade
Title: Not Special Forces
Posts:
2,361
Registered:
Mar 1, '04
Extended Info (if available)
Real Post Cnt: 2,064
User ID: 900,170
|
Subject:
Math question
|
Centripetal acceleration will cause a change in the weight of a mass resting on the earth's surface. As you approach the equator, this acceleration increases in value. The equatorial radius of earth is approximately 6400 km, with a rotational period of approximately 24 hours. Using the formula (4 * pi^2 * r/T^2), and converting hours to seconds, you arrive at a centripetal acceleration of approximately .03 m/s^2 at the equator. A given mass, on the equator, is subject to both this centripetal acceleration and acceleration due to the force of gravity. An object resting on the surface of the earth at the pole of the spin axis is not subject to the centripetal acceleration.
The oblate shape of earth also contributes to changes in gravitational force as a mass moves along the surface between the equator and either pole. The gravitational force and the distance between two objects share an inverse square relationship. Using the accepted formula for the gravitational force between two objects, F = G*(m1 * m2)/r^2, with G being the gravitational constant, one can see that the magnitude of the force value will change with latitude. When appropriate mass and radius values are substituted into this equation, you arrive at equatorial and polar acceleration values of approximately 9.78 and 9.83. The weight difference is about 0.5%. So for a 100 kg mass on the pole, a shift to the equator would account for a decrease of .5 kg. In the case of the 40 pound bucket? You do the math. In the context of a mass resting on the surface of the earth, it is also true that the density and composition of the material that the mass is resting on ( in a straight line from the surface all the way to the exact center of the earth ) will effect the force, but the value of that change is usually less than 0.01%. Geological formations near the mass on the surface can also have a very, very minute effect. Moral of the story: Altitude matters because radius matters. Latitude matters because radius matters. In the case of a 20 ft rope? The difference is gravitational acceleration is obviously less than negligible.
But anyhow, the real argument here is a matter of work done on a mass, and this can be conceptualized by thinking about the work that would need to be done against gravity to raise a bucket. If you grab a bucket with one hand and lift it a distance of 10 meters, a certain amount of work is being done against gravity. The same can be said if you are holding on to a 20ft rope attached to the bucket. The real meaningful difference is just the different groups of muscles and different lengths of contractions involved in the two scenarios. Friar asked, "How much does the perception of the amount of weight make it seem like is being lifted?" I guess the only real answer is this: It just depends on the person and how they lift stuff.
-----signature-----
"drive a SUV and have a Apple straped to your azz" - Blue_Arrow
"You guys know that I love homosexuals." - GrilledCheez
|
|
Link to this post
|
ZartanAround
Title: Torpid Curmudgeon
Posts:
13,775
Registered:
Feb 6, '04
Extended Info (if available)
Real Post Cnt: 11,365
User ID: 892,117
|
Subject:
Math question
|
Friarspam posted:
ZartanAround posted:
don't act like a martyr dooshbag.
you simply didn't provide enough information to get a correct answer.
infact, i am CERTAIN that you don't even understand the question that you're asking.
either way, wtf do you care what the answer is?
at this rate your'd be better off hanging yourself with that 20ft rope.
My 80 some odd year old uncle drew water from a well with a rope, that's WHY I'd like to know. He did this a lot over a z year period.
i'm guessing you must not know either since you haven't answered the question.
HERE IS THE ANSWER THAT YOU WANT:
80years x 40lbs x 20ft = 64000lbs
WOW!!! YOUR UNCLE IS SO FUCKING STRONG!!!
-----signature-----
what are nice chickens like you doing in a coop like this?
|
|
Link to this post
|
ZigmundZag
Title: Grammar Nazi
Posts:
25,948
Registered:
Mar 25, '02
Extended Info (if available)
Real Post Cnt: 22,707
User ID: 661,552
|
Subject:
Math question
|
|
You forgot to put that into the proper measurement of footyearpounds.
-----signature-----
"Take the cheese to sickbay!"
|
|
Link to this post
|
ZartanAround
Title: Torpid Curmudgeon
Posts:
13,775
Registered:
Feb 6, '04
Extended Info (if available)
Real Post Cnt: 11,365
User ID: 892,117
|
Subject:
Math question
|
-----signature-----
what are nice chickens like you doing in a coop like this?
|
|
Link to this post
|
IMHO
Title: Official Outpost Greeter
Posts:
30,884
Registered:
Nov 1, '01
Extended Info (if available)
Real Post Cnt: 28,020
User ID: 490,177
|
Subject:
Math question
|
Friarspam posted:
ok I can see that either I'm not being clear on what I want to know or we're moving down assinine highway so I'll try again:
If a given weight is lifted straight up how much does the weight appear to the person doing the lifting?
Example: 40 lb lifted from the surface of the weight -vs- 40 lb lifted feom 20 foot.
now, I know that 40 lbs does not "change", but how much does it FEEl like is being moved. Also, before someone asks, I don't know the elevation, barometeic pressure, temperature and the rope is magic and weighs nothing for the purpose of this question.
/this thread is like trolling myself lol
Are you seriously asking if there is a "wind Chill Factor" for lifting weight?
Where is Sweeney? he could have saved us all this aggravation and answered this question pages ago.
-----signature-----
You're Right ~ Koneg
He's [Manegarm] like the Fred Phelps of atheism. ~Bubbledude
many of you are in the Republican boat, aka the ship of fools. ~Modeeb
We are here on Earth to fart around. Don't let anybody tell you any different. ~Kurt Vonnegut
|
|
Link to this post
|
Crackdoc
Posts:
6,681
Registered:
Oct 7, '05
Extended Info (if available)
Real Post Cnt: 6,609
User ID: 1,082,910
|
Subject:
Math question
|
Groucho48 posted:
If it is at the end of a long rope and it starts swinging around, that might make it seem heavier. Because some of your lifting power is being used for horizontal movement rather than all of it going to vertical movement. Other than that, except for a minimal decrease in gravity as it moves upward, 40 pounds is 40 pounds.
This is the likliest answer - the stress points on a human body for achieving the 'easiest' lift vary as the bucket swings and this DOES make the bucket 'feel' heavier. A lift between the legs is the least likely to have this effect, one while bent over the well opening the most.
-----signature-----
People in the Middle-East: They Are ALL Crazy as BedBugs!!!
Erich Fromm: “There is only one meaning of life: the act of living itself.â€
Toss aside the paradigms of civility you hold - welcome the social dysfunction of tomorrow.
|
|
Link to this post
|
Fat_wong
Posts:
2,197
Registered:
Feb 6, '07
Extended Info (if available)
Real Post Cnt: 2,137
User ID: 1,204,315
|
Subject:
Math question
|
|
only on the outpost could this be a 50 + post discussion.
-----signature-----
(none)
|
|
Link to this post
|
Sansfear
Posts:
7,232
Registered:
Aug 31, '08
Extended Info (if available)
Real Post Cnt: 7,182
User ID: 1,318,423
|
Subject:
Math question
|
Let's just push Friar down the well when he goes to test his theory.
-----signature-----
(none)
|
|
Link to this post
|
Shimatta33
Posts:
12,418
Registered:
Nov 19, '03
Extended Info (if available)
Real Post Cnt: 10,035
User ID: 859,758
|
Subject:
Math question
|
Fat_wong posted:
only on the outpost could this be a 50 + post discussion.
-----signature-----
'tis an ill wind that blows no minds...
|
|
Link to this post
|
sorrento
Posts:
258
Registered:
Jan 28, '04
Extended Info (if available)
Real Post Cnt: 204
User ID: 888,465
|
Subject:
Math question
|
|
It would feel much heavier if you tied the rope to your penis and tried to pull the bucket out of the well, of that much I am certain.
-----signature-----
(none)
|
|
Link to this post
|
Altra_Shadowstalker
Posts:
17,553
Registered:
Jan 17, '02
Extended Info (if available)
Real Post Cnt: 16,076
User ID: 616,837
|
Subject:
Math question
|
|
Having tried that, I can tell you only one pull up is possible at a time.
-----signature-----
"Goddammit, Swearengen, I don't trust you as far as I could th'ow you, but I enjoy the way you lie."
I don't typo often, but when I do, I blame Swype.
|
|
Link to this post
|
Azure-TheBlueOne
Title: Made in Alaska
Posts:
7,936
Registered:
Feb 24, '03
Extended Info (if available)
Real Post Cnt: 7,754
User ID: 773,760
|
Subject:
Math question
|
I saw something like this earlier this week. A woman was trying to figure out how long it would take you to go 80 miles traveling at 80 mph.
-----signature-----
"When the government scares people into thinking it must take their liberties away, and the people let the Government do it. They are sheep." - Judge Andrew Napolitano http://www.leap.cc/cms/index.php
|
|
Link to this post
|
Orwyn_Blackheart
Posts:
2,993
Registered:
Jul 26, '06
Extended Info (if available)
Real Post Cnt: 2,923
User ID: 1,159,055
|
Subject:
Math question
|
What Friar isnt telling you is that his uncle wasn't lifting a bucket at the end of that rope....
it was a black man instead......... and he trying to carry on the tradition.........
what a sick puppy
-----signature-----
(none)
|
|
Link to this post
|
Friarspam
Posts:
12,363
Registered:
Jan 23, '07
Extended Info (if available)
Real Post Cnt: 10,619
User ID: 1,200,702
|
Subject:
Math question
|
Orwyn_Blackheart posted:
What Friar isnt telling you is that his uncle wasn't lifting a bucket at the end of that rope....
it was a black man instead......... and he trying to carry on the tradition.........
what a sick puppy
My great-grandfather was an actual Baldknobber. I'm also pretty sure thar someone way back was in the KKK but nobody can/will confirm that.
anyway, I'm pretty sure the bucket would feel heavier even though it's weight doesn't change.
-----signature-----
My folks went on vacation and all I got was this lousy sig.
|
|
Link to this post
|
Altra_Shadowstalker
Posts:
17,553
Registered:
Jan 17, '02
Extended Info (if available)
Real Post Cnt: 16,076
User ID: 616,837
|
Subject:
Math question
|
However he was lifting it, if he's done it for years, he developed those muscles so it probably "felt" like a 10lbs bucket.
The rest of the assholes in this thread should STFU and get out of my well.
-----signature-----
"Goddammit, Swearengen, I don't trust you as far as I could th'ow you, but I enjoy the way you lie."
I don't typo often, but when I do, I blame Swype.
|
|
Link to this post
|
Sinlock
Title: Savior of the Camelot Outpost
Posts:
27,600
Registered:
May 14, '00
Extended Info (if available)
Real Post Cnt: 26,129
User ID: 24,657
|
Subject:
Math question
|
My name is Sinlock, and I approve of this thread.
-----signature-----
THOOOOKA...THOOOOOKA...THOOOOOKA...
Future Grand President For Life of the Universe (you'll see! you'll be sorry then!)
Outpost Terrorist #1! I don't care what any law says!
|
|
Link to this post
|
