Posted by **Anonymous** on Sunday, November 11, 2012 at 5:39pm.

A 9.0 kg cylinder rolls without slipping on a rough surface. At an instant when its center of gravity has a speed of 12.0 m/s, determine (a) the translational kinetic energy of its center of gravity.

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**bobpursley**, Sunday, November 11, 2012 at 5:49pm
a translational=1/2 m v^2

b. rotational: I w^2=I (v^2/r)

where I= lookup. Is it a solid cylinder, or hollow?

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**derp**, Friday, November 16, 2012 at 8:59pm
how do you get the radius though?

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