Question

A crate of mass 10.8 kg is pulled up a rough incline with an initial speed of 1.58 m/s. The pulling force is 102 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 5.02 m.

(a) How much work is done by the gravitational force on the crate?
J

(b) Determine the increase in internal energy of the crate–incline system owing to friction.
J

(c) How much work is done by the 102-N force on the crate?
J

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

(e) What is the speed of the crate after being pulled 5.02 m?
m/s

Answer 1

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