A crate of mass 9.4 kg is pulled up a rough incline with an initial speed of 1.46 m/s. The pulling force is 94 N parallel to the incline, which makes an angle of 20.2° with the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled 4.92 m.
(a) How much work is done by the gravitational force on the crate?
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(b) Determine the increase in internal energy of the crate–incline system owing to friction.
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(c) How much work is done by the 94-N force on the crate?
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(d) What is the change in kinetic energy of the crate?
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(e) What is the speed of the crate after being pulled 4.92 m?