Am I right ?

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RJKhan's Avatar (by Gravatar)RJKhan posted on
May 16, 2009, 3:05 am
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Hi

An object is attached near the periphery of a bigger one and the
bigger object is rolling.
After some time the link between the two breaks and the smaller one
flies off tangentially.


I want to know whether in addition to its tangential translation will
the smaller object spin too ?


I think it should spin as it should inherit rotational motion which
it
experienced while being on-board the larger object. And that spin
rate
should be equal to the rate of roll of the larger object. The mass
center of the smaller obj however moves along the straight line
tangentially.


Am i right ?


Thanks and regards


RJ Khan


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pnachtwey's Avatar (by Gravatar)pnachtwey posted on
May 16, 2009, 12:49 pm
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Re: Am I right ?


Yes, almost all of the time. The key word is breaks which implies
force. It is possible the force that breaks the two objects apart also
stops the rotation of the small object. This would be a rare
accidental fluke.  If this needs to happen all the time one would need
to calculate the force to cause the two object to break apart and the
point on the small object to apply the force so that the small object
wouldn't spin.  If you had used the words separated without external
force, then you are right 100% of the time.  There would be no force/
torque to stop the rotation.

Peter Nachtwey


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RJKhan's Avatar (by Gravatar)RJKhan posted on
May 16, 2009, 11:11 pm
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Re: Am I right ?


Thanks a lot
Actually, some one wants a reference for my point.
I have looked into various resources books, internet etc but none
talked about the spin.
I will be grateful if anybody could refer me something addressing the
exact detail of the problem.

Regards

RJ

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