A m = kg block is set into motion up an inclined plane with an initial speed of vi = m/s (Fig. P8.23). The block comes to rest after traveling d = m along the plane, which is inclined at an angle of th = ° to the horizontal. For this motion, determine
(a) the change in the block's kinetic energy,
(b) the change in the potential energy of the block Earth system, and
(c) the friction force exerted on the block (assumed to be constant).
(d) What is the coefficient of kinetic friction?