1411

Physics Work,Power & Energy Level: High School

A 4.0 kg block is lowered down a 37 degree incline a distance of 5.0 m from point A to point B . A horizontal force (F = 10 N) is applied to the block between A and B . The kinetic energy of the block at A is 10 J and at B it is 20 J . How much work is done on the block by the force of friction between A and B ?