On a straight track

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

On a straight track, a locomotive exerts a constant forward force of

5\,\text{kN}

on a train for a distance of

2\,\text{km}

. Resistive forces of

1.8\,\text{kN}

act opposite to the motion over the same distance. Determine the net work done on the train, expressed in kilojoules (kJ). (a)

13600\,\text{kJ}

(b)

6400\,\text{kJ}

(c)

10000\,\text{kJ}

(d)

640\,\text{kJ}