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A mobile phone move aside when it vibrates. How is that happening ? and most importantly is it possible to make any changes to the vibration motor to stop moving when vibrating or any other methods to stop that ? I have already read following links Would a phone move upon vibration in a completely uniform situation? How does a mobile phone vibrate without any external force?

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  • $\begingroup$ Possible duplicate of: physics.stackexchange.com/questions/61436 $\endgroup$ – Michiel Mar 15 '14 at 7:21
  • $\begingroup$ You say that you have read the above post already, but the answer to your question is in there, by John Rennie, so I suggest you read it again or specify what it is you still cannot understand from that answer. $\endgroup$ – Michiel Mar 15 '14 at 7:22
  • $\begingroup$ Thanx for the reply Michiel. I want to know that what changes should I do to stop that moving ? $\endgroup$ – user42571 Mar 15 '14 at 7:32
  • $\begingroup$ You cannot stop the phone moving without changing the centre of mass. I suppose you could open the case and put lead weights inside, but this doesn't seem a practical solution. Alternative buy a rubber or some other high friction case. $\endgroup$ – John Rennie Mar 15 '14 at 7:57
  • $\begingroup$ @JohnRennie thnx for the reply. So to stop moving, designers of the mobile phone should locate the vibrator in a place where it satisfy the centre of mass concept. Is it correct ? $\endgroup$ – user42571 Mar 15 '14 at 8:44

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