1. The problem statement, all variables and given/known data The rotating drum on a clothes washer has a rotational inertia of 1.2 kg*m^2. In the spin cycle, it rotates at 240 rev/min. (a) What length of time is required for a 0.25 hp motor to bring the drum to this rotation rate starting form rest? (b) If the angular acceleration is uniform, how many rotations will the drum make during this time? 2. Relevant equations KEr = 1/2IW^2 3. The attempt at a solution I am stuck on this problem because I do not know how to relate the power output of the motor to the angular acceleration or relate it to the angular velocity. I know that .25 hp means that it is putting out 186.5 j of energy per second but I am unsure of how to use that information.