A crate of mass 10.5 kg is pulled up a rough incline with an initial speed of 1.54 m/s. The pulling force is 109 N parallel to the incline, which makes an angle of 20.5° with the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled 4.96 m.

(a) How much work is done by gravity?

(b) How much energy is lost because of friction?

(c) How much work is done by the 109 N force?


(e) What is the speed of the crate after it has been pulled 4.96 m?

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