Question

A 5.0 kg block starts from rest at the top of an incline with an acceleration of 4.0m/s^2. (a) determine the angle of incline, assuming first that there is no friction. (b) Under the same assumption, what is the normal force. (c) In what time will the block move the distance of 3m along the incline. (d) assuming now that there is friction and the coefficient of kinetic friction is equal to 0.35, what would be the angle of incline when acceleration is still 4.0m/s.