Question an 85 kg crate is pulled 51 m up a 30 degree, Ask an Expert

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Question: An 8.5 kg crate is pulled 5.1 m up a 30 degree incline by a rope angled 17 degrees above the incline. The tension in the rope is 140 N and the crate's coefficient of kinetic friction on the incline is 0.27.

1) How much work is done by (a) tension, by (b) gravity, and by (c) the normal force?

2) What is the increase in thermal energy of the crate and incline?

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