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Rope Faling Answered

what would happen if you put a rope around the world and tied one end to the front of a house and one to the back of the house the held on to it and cut it on the other side (not the on your holding on to)

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Slayer7 (author)2008-04-08

Hi, What i mean by the question is how long would it take to fall EG: 1 second, 1 minute

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NachoMahma (author)Slayer72008-04-08

. The same amount of time it would take a ball to fall from the same height. For that problem, the rope, house, and World (other than producing gravity) don't have anything to do with it

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bommber man (author)2008-04-07

im cofused someone explain

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Goodhart (author)bommber man2008-04-07

When the moon is in the 7th house, and Jupiter aligns with Mars then peace will guide the planets, and love with steer that stars.......

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NachoMahma (author)Goodhart2008-04-07

. Geez. You ARE old. heehee

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Goodhart (author)NachoMahma2008-04-07

Don't get me started.....I will start reciting lyrics from the TROGGS next LOL

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Kiteman (author)2008-04-07

The rope would flop to the ground. Wouldn't it?

Searches for trick question, can't find one.

Yeah, it would fall to the ground.

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ll.13 (author)Kiteman2008-04-07

No, you'd actually go flying round the world.

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Kiteman (author)ll.132008-04-07

Why? He didn't say there was any tension on it, he didn't say it was off the ground in any way - it's just a rope on the ground, except for the last couple of feet. The length of rope in between is irrelevant.

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ll.13 (author)Kiteman2008-04-07

but look, say if you scaled it down, to a cricket ball, what would happen?

:-)

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Kiteman (author)ll.132008-04-07

It would get stuck in the seams? I think Slayer7 may have mis-typed the question - there must be something missing from it.

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ll.13 (author)Kiteman2008-04-07

well would a football or golf ball do?

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NachoMahma (author)ll.132008-04-07

. The small objects you are talking about don't have much of a gravitational field to attract the rope.

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ll.13 (author)NachoMahma2008-04-07

Oh, I was working with an outside gravity ;-) (and the house at the north pole)

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NachoMahma (author)ll.132008-04-07

. Your position on the globe will have no practical effect on the problem.

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gmoon (author)ll.132008-04-07

Are you scaling up the other factors--friction, tension on the rope?

Let's wrap a rope around a 100 foot circumference sphere that has some surface texture. Say it takes about 100 lbs of force to get a little tug at the end of the rope--due to friction and the rope stretch.

Scale that up to earth size--the circumference of the earth
at the equator (in feet) is 24,902 * 5,280 = 131482560

Divide by 100 (our rope length), then multiply by 100 lbs/force per rope length (don't bother with the math as the result is the same.) Results: you'd need to apply a pulling force of 131,482,560 lbs to feel it on the other end....

(It's not a realistic scenario, but unless you could control what the rope contacts, IMO you'd average way more friction than 100 lbs/100 ft could overcome...Of course, the rope would break long before the applied force was evenly spread out.)

That's not even considering elongation of the rope, too...

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thejrb (author)2008-04-07

Nothing if their wasn't ALOT of tension.

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