Would a human being be able to run faster, jump high, etc. if the gravity on Earth weakened? I'm assuming a weaker gravitational pull would cause the muscle to deteriorate because the body no longer needs that muscle?? Would humans have grown to larger heights if the Earth had weaker gravity? Would things fall slower? How would it affect things like water or trees and plants?

Could stronger winds possibly compensate?? Like if the gravity was weaker, muscle mass would decrease, but if a constant strong wind were to blow, could it force the body to build up muscle to withstand it? Would the stronger winds cause mountains and hills to deteriorate?

Thank you.

  • $\begingroup$ Weakened by how much? $\endgroup$ – HDE 226868 Sep 20 '15 at 22:49
  • $\begingroup$ For how long is "gravity weakened"? Is it that tomorrow's gravity is unusually-weak, or that we evolved on a planet with weaker gravity? $\endgroup$ – nitsua60 Sep 24 '15 at 3:01

It's very likely that muscles would deteriorate, but it is hard to say exactly how much.

A lower value of gravity would indeed let your characters jump higher, but their running speed would not change (it might actually get slower as they wouldn't have much good grip on the ground). Also notice that here we are assuming the muscle deterioration has not taken place yet. If muscles have accordingly deteriorated, your characters' jumping would be dependent on their muscle power. See, a kangaroo can jump far higher and longer than a human even under the current gravitational field. So it depends not only on gravitation, but your muscle power too.

Things would fall slower, yes. That's right.

Stronger winds would not facilitate muscle growth. A very strong man weighing 100 kg would be swept away by a strong wind exactly as a large lump of clay of the same mass (and density).

Yes, stronger winds would cause faster erosion of geographical features such as mountains and hills.

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    $\begingroup$ it's more than likely, it's been observed during long duration space missions on board space stations. $\endgroup$ – jwenting Sep 21 '15 at 10:03
  • $\begingroup$ I was aware that the immune system underwent gradual deterioration, but I didn't know a weak gravitational medium also had measured effects on bone mass and muscles. $\endgroup$ – Youstay Igo Sep 21 '15 at 11:17
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