NTNUJAVA Virtual Physics Laboratory
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Information about this web site => Question related to Physics or physics related simulation => Topic started by: tanghb on November 05, 2011, 01:32:44 pm



Title: Puzzling rolling bottle/jar
Post by: tanghb on November 05, 2011, 01:32:44 pm
Why does a cylindrical bottle/jar keep rolling back and forth once given an initial push, like a SHM? It is really a SHM? If so, what force becomes the restoring force (F=-kx) ? Please watch this video: http://youtu.be/nosZ2p07YJo (http://youtu.be/nosZ2p07YJo)
[youtube=nosZ2p07YJo]
The motion of the jar in the video is not very smooth, probably due to its irregular surface. If the jar or bottle is perfectly cylindrical, and the floor is also perfectly horizontal, the motion should be smooth. Similar motion is observed when the jar/bottle is partially/fully filled with water.

Could someone explain such a motion?


Title: Re: Puzzling rolling bottle/jar
Post by: ijfdyht89 on June 20, 2012, 03:57:33 pm
I just want to change the freefall animation to be a non-parabolic horizontal animation.
You can see the particle goes frome north to south. I only want it to go from left to right like this :'( :'(


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Title: Re: Puzzling rolling bottle/jar
Post by: jonihalish on April 07, 2013, 03:47:02 pm
very nice site looking so good loving article i like this blog.
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Title: Re: Puzzling rolling bottle/jar
Post by: Fu-Kwun Hwang on April 09, 2013, 08:18:49 am
Why does a cylindrical bottle/jar keep rolling back and forth once given an initial push, like a SHM? It is really a SHM? If so, what force becomes the restoring force (F=-kx) ? Please watch this video: http://youtu.be/nosZ2p07YJo (http://youtu.be/nosZ2p07YJo)

The motion of the jar in the video is not very smooth, probably due to its irregular surface. If the jar or bottle is perfectly cylindrical, and the floor is also perfectly horizontal, the motion should be smooth. Similar motion is observed when the jar/bottle is partially/fully filled with water.

Could someone explain such a motion?
I hope the following simulation might help to solve it.