Posted by **Vince** on Sunday, April 28, 2013 at 8:23am.

A 39.0 kg box initially at rest is pushed 4.50 m along a rough, horizontal floor with a constant applied horizontal force of 135 N. If the coefficient of friction between box and floor is 0.300, find the following.

(a) the work done by the applied force

J

(b) the increase in internal energy in the box-floor system due to friction

J

(c) the work done by the normal force

J

(d) the work done by the gravitational force

J

(e) the change in kinetic energy of the box

J

(f) the final speed of the box

m/s

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