On reaching the top of a slope 6 m high from its bottom, a cyclist has a speed of 1.5 ms . Find the kinetic energy and the potential energy of the cyclist. The mass of the cyclist and his bicycle is 40kg. (45 J, 2400 J) A motor boat moves at a steady speed of 4 ms . Water resistance acting on it is 4000 N. Calculate the power of its engine. (16 KW) A man pulls a block with a force of 300 N through 50 m in 60 s. Find the power used by him to pull the block. (250 W)