The platter of a record player by a mass of 0.5 kg and radius 0.12 m is spinning with an angular speed of 5 rad/s. The rotational inertia of the platter about its axis of rotation is 3.60x10^-3 kg*m^2. If you touch the outer edge of the platter and apply a frictional force of 0.8N, how long i will it take for the platter to come to rest? Other than your hand, suppose no external torques act on the platter.