A sledge loaded with bricks has a total mass of 17.9 kg and is pulled at constant speed by a rope inclined at 19.4° above the horizontal. The sledge moves a distance of 20.4 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?   _____ kJ (c) What is the mechanical energy lost due to friction?  _______ kJ

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