A block is moved down an incline a distance of 5.0m from point A to point B by a force F that is parallel to the incline and has a a magnitude of 2.0 N. The magnitude of the frictional force acting on block is 10N. If the kinetic energy of the block increases by 35 J between A and B, how much work is done on the block by its weigh as the block moves from A to B?