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A hoop (rotational inertia ) of mass 2.00 kg and radius 0.50 m is rolling at...

A hoop (rotational inertia ) of mass 2.00 kg and radius 0.50 m is rolling at a centerof-mass speed of 2.50 m/s. An external force does 75.0 J of a positive work on the hoop.

(a) Calculate the initial total kinetic energy KE and

(b) find the new speed of the hoop. (hint: W = ∆KE = KEf − KEi , KE = KEtrans + KErot, w = v/R)

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