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[Phys-l] Dynamics Question



I am stumped on the following and am looking for a good way to think about the problem.

A uniform disk of mass M and radius R has a massless, thin thread wrapped around the rim and this thread is pulled by a constant force in the plane of the disk. This force is the net force acting on the disk (ie in deep space away from any other masses) . What is the linear acceleration of the CM of the disk and what is the angular acceleration about the CM caused by this force?
How do the answers change if it is a uniform hoop?

Thanks for some direction on getting at these questions.

David Abineri



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D. Abineri dabineri@fuse.net