2. An object of mass m slides down a plane inclined at angle 8' to the horizontal. If the object is released from rest at height 1') above the horizontal, and the coefficient of kinetic friction is w determine: [a]: The work done on the object by the surface of the incline when the object reaches the bottom of the incline {b} The change in the kinetic energyr of the block Given: El: h: 59': [a]: W (to) ME