A belt sander, shown in Figure P1.63, weighs 10 lb and has a belt speed of 1000 ft/min. A downward force of 10 lb (in addition to the weight) is applied on the sander. If the coefficient of friction between the belt and a flat table top being sanded is 0.30, determine (a) the power transmitted by the belt in hp, and (b) the work done while sanding the table top for 15 minutes in ft-lb.