Answer 2_5_5
An electric locomotive is pulling a train at a constant speed of 30 m/s. The train has a rolling resistance of 100 kN.
(a) What force must the locomotive produce? Explain your answer.
It must pull with a force of 100 000 N because the forces are balanced. (We will explore this more when we look at Newton's Laws)
(b) What power does it develop?
Power = force x speed = 100 000 N x 30 m/s = 3 000 000 W = 3 x 106 W =
3 MW