Would the jumping simultaneously in one spot make the earth's rotation just a split second faster since no one was touching the ground> Or would it make it slower since we would all come down and stomp at the same time as well? Its a physics question, and I learned it in college physics, but I have since forgotten... thoughts? p=mv
2006-07-03 07:10:36 · 10 answers · asked by Peter Griffin 6 in Science & Mathematics ➔ Physics
What an interesting question...p=mv, and angular momentum (which deals with spin) is L=mvr. I suppose if every man, woman and child jumped at the same time, according to conservation of angular momentum the Earth would HAVE to speed up an incredibly small amount--probably much too small for us to measure. The thing is, the Earth is very massive - 6.0 x 10^24 kilograms. For the purposes of the question, let's assume that the average person on the Earth weighs, say, 170 lbs. That's 77 kilograms. Multiply that by 6 billion, and you get 462,000,000,000 kilograms, or 4.6 x 10^11 kilograms. That sounds like a lot, but 6.0 x 10^24 kilograms - 4.6 x 10^11 kilograms is still, if you round up, about 6.0 x 10^24 kilograms.
In short, will it make a difference? Probably. A noticeable difference? Highly unlikely.
2006-07-03 07:26:17 · answer #1 · answered by malsirofimladris 3 · 0⤊ 0⤋
Jumping up would make no difference whatsoever to the earths rotational speed as the force would act through the earths centre of gravity. However, jumping forward or backward would temporarily affect the rotational speed.
However, the mass of the earth is 5.9742×10^24 kg. The earth's human population is approx 6.5*10^9 so as a ratio we are approx 50/10^15th of the world mass (assuming we each wigh 50kg on average) or a 20 thousand billionth of the total. I can't see the world bothering to notice.
In time terms, if all humanity was a second, the world in comparison would be 633762 years old.
Interesting question though, unfortunately I now feel really really small as if all humanity was a second I'm just a 1/6 of a nanosecond.
2006-07-03 07:24:45 · answer #2 · answered by Anonymous · 0⤊ 0⤋
I don't believe it would change a thing. It's like if you're holding a fan with your finger and let it go for a second; it won't have time to reach full speed in a single second. My point of view is that it would be the same with the earth, but in a much (MUCH!) larger scale :)
If it would indeed gain speed as we all jump, it would be so incredibly minimal. I doubt it gain a second.
2006-07-03 07:15:34 · answer #3 · answered by Lyvy 4 · 0⤊ 0⤋
this is referred to as equilibrium. Get a "good" and spin it around, after a undeniable length of time, does it no longer end spinning and fall to the floor? of direction it does. and you're able to too in case you are trying this to your self. canines don't get dizzy as extremely as human beings via fact they're already on all fours whilst they start up spinning.
2016-11-01 03:44:00 · answer #4 · answered by treiber 4 · 0⤊ 0⤋
You're forgetting action/reaction. Even if jumping did change anything (which I doubt) the landing would cancel it. This is why you can't pull yourself up by pulling on your feet.
2006-07-03 07:23:00 · answer #5 · answered by Anonymous · 0⤊ 0⤋
impossible ,cuz the time around the world n only few place could jump at the same time ..it be cool if it could happen!
2006-07-03 08:30:06 · answer #6 · answered by Anonymous · 0⤊ 0⤋
yes
2006-07-03 07:14:31 · answer #7 · answered by wdog 1 · 0⤊ 0⤋
you may cause a hole that is too big to crawl out of
2006-07-03 07:18:08 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Every action has an equal and opp reaction !!!!!!!!!!!!!
No change
2006-07-03 07:49:35 · answer #9 · answered by The Game BOY ! 1 · 1⤊ 0⤋
No.
2006-07-03 08:41:53 · answer #10 · answered by Irish 7 · 0⤊ 0⤋