A sledge loaded with bricks has a total mass of 18.1 kg and is pulled at constant speed by a rope inclined at 20.8° above the horizontal. The sledge moves a distance of 19.8 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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