A sledge loaded with bricks has a total mass of 18.4 kg and is pulled at constant speed by a rope inclined at 20.4 above the horizontal. The sledge moves a distance of 19.9 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500. (a) What is the tension in the rope? N (b) How much work is done by the rope on the sledge? (c) What is the mechanical energy lost due to friction? KJ A 7.0 kg bowling ball moves at 2.15 m/s. How fast must a 2.80 g Ping-Pong ball move so that the two balls have the same kinetic energy? m/s