physic

Hi! I try already but, the answer is wrong could you help me to fix it out.
A sledge loaded with bricks has a total mass of 17.8 kg and is pulled at constant speed by a rope inclined at 20.8° above the horizontal. The sledge moves a distance of 20.6 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?J

c) What is the mechanical energy lost due to friction?J

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asked by Chan
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