Naked Science Forum
Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: colmack2 on 15/11/2017 23:21:29
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Trivial but puzzling: After exercising on my Swiss Ball (on carpet), I stand up and after a few seconds the ball starts to roll. The floor is level. Any hypotheses?
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Can you post a video?
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The ball is made of rubber, right? Maybe static electricity has something to do with it. Does it always move in the same direction?
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...After exercising on my Swiss Ball (on carpet), I stand up and after a few seconds the ball starts to roll. The floor is level. Any hypotheses?
The weight of the air-valve will give it a bias ...
(https://www.thenakedscientists.com/forum/index.php?action=dlattach;topic=71863.0;attach=24312;image)
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...After exercising on my Swiss Ball (on carpet), I stand up and after a few seconds the ball starts to roll. The floor is level. Any hypotheses?
The weight of the air-valve will give it a bias ...
(https://www.thenakedscientists.com/forum/index.php?action=dlattach;topic=71863.0;attach=24312;image)
The simplest explanations are always the best, and usually right! Thanks @RD for pointing out the obvious!
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When you stand up, the back of your knees give the ball a slight backwards push?