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5. A cylinder ( I = , MR', w = v/r ) of mass 4.00 kg and radius 0.50 m is rolling at a center-of-mass speed of 0.50 m/s. An external force does 2.50 J of work on the cylinder. (a) Calculate the initial total kinetic energy KE and (b) find the new speed of the cylinder. (hint: work-energy theorem W = AKE = KE - KEi) (a) KE = KEtrans + KErot = = Mv2 + - 102 = KEf = W + KEi = (b)of =