Question

A 10 kg box initially at rest is pulled with a 50 N horizontal force for 4 m across a level surface. The force of friction acting on the box is a constant 20 N. How much work is done by the 50 N force?

Answer 1

The work is done by the 50 N force is 200 J.

Work done by the 50 N force

Work done = Fd

where;

• F is Force applied
• d is the displacement of the object

Work done = 50 N x 4 m = 200 J

Thus, the work is done by the 50 N force is 200 J.

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