A tugboat pulls a barge along a straight canal by exerting a constant horizontal force of

PHYSICS · Multi-part · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

A tugboat pulls a

5000\,\text{kg}

barge along a straight canal by exerting a constant horizontal force of

8.0\,\text{kN}

. The water exerts a constant resistive force of

2.0\,\text{kN}

opposite to the motion. The barge starts from rest and is towed a distance of

200\,\text{m}

. (i) Calculate the net work done on the barge over the

200\,\text{m}

distance. (ii) What is the kinetic energy of the barge after it has moved

200\,\text{m}

? (iii) Determine the speed of the barge at this point. (iv) Compute the average power delivered by the tugboat during the towing operation.