A crate of mass 125 kg is pulled up a rough incline with an, Ask an Expert

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A crate of mass 12.5 kg is pulled up a rough incline with an initial speed of 1.50 m/s. The pulling force is 100 N parallel to the incline, which makes an angle of 21.0° with the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled 5.20 m.

(a) How much work is done by gravity?

(b) How much mechanical energy is lost due to friction?

(d) What is the change in kinetic energy of the crate?

(e) What is the speed of the crate after being pulled 5.20 m?

m/s

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