1 A coin of radius r. and thickness & rests on an inclined plane. Initially it is at the ambient temperature T. The coin is released and begins to slide down the plane. The frictional force F, is assumed constant and the velocity changes with time according to V = ct, where c is constant. Due to changes in velocity, the heat transfer coefficient h varies with time according to h = t where is constant. Assume that the Biot number is small compared to unity and temperature of the coin. V = ct F Vo out S neglect heat loss to the plane, determine the transient in