The uniform disk of radius r = 0.8 ft and weight w = 20 lb is pin-connected to the link ab and is pulled on its periphery by a force p via a rope that is wrapped around the disk. the coefficient of kinetic friction between the disk and the surface on which it sits is μk = 0: 5. neglect the mass of link ab and assume that μs is insufficient to prevent slipping. for p = 15 lb and θ = 0degree, determine the angular acceleration of the disk αd and the time it takes to achieve an angular velocity of ωd = 35 rad/s, assuming that the disk starts from rest.