Question

A 75-kg man pushes a 10-kg cart along a 25-m corridor with a 1500-N force at an angle of 30O with the horizontal at a µ of 0.45.Find the work done.

Answer 1

The work done by a man

$$W=Fd\cos\theta$$ $$=\rm 1500\: N\times 25\: m\times \cos 30^{\circ}=32476\: J=32.5\: kJ$$