In the figure, a block slides down an incline. As it moves from point A to point B, which are 4.7 m apart, force Facts on the block, with magnitude 2.7 N and directed down the incline. The magnitude of the frictional force acting on the block is 13 N. If the kinetic energy of the block increases by 49 J between A and B , how much work is done on the block by the gravitational force as the block moves from A to B ?
