[" 6.A hollow sphere is released from the top of an inclined "],[" plane of inclination "theta" .(a) What should be the minimum "],[" coefficient of friction between the sphere and the plane "],[" to prevent sliding? ( "6" ) Find the kinetic energy of the "],[" ball as it moves down a length "l" on the incline if the "],[" friction coefficient is half the value calculated in part (a)."],[" A solid enhero of mans "]