A 19.1 kg box initially at rest is pushed7.26 m along a rough, horizontal floor

Question

A 19.1 kg box initially at rest is pushed7.26 m along a rough, horizontal floor with a constant appliedhorizontal force of 64.6745 N. If the coefficient of frictionbetween box and floor is 0.275, find the work done by the appliedforce. The acceleration of gravity is 9.8 m/s2. A 19.1 kg box initially at rest is pushed7.26 m along a rough, horizontal floor with a constant appliedhorizontal force of 64.6745 N. If the coefficient of frictionbetween box and floor is 0.275, find the work done by the appliedforce. The acceleration of gravity is 9.8 m/s2.

Explanation / Answer

The net force acting on the box F = Fh - f                                                    = Fh - mg                                                    = 64.6745 - 0.275 * 19.1 * 9.8                                                    = 13.2 N Workdone by the applied force W = F.s = 13.2 * 7.26 = 95.832 J

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