A car is moving with a constant speed on a straight line. What is the net work done by the external force on the car?

A car is moving with a constant speed on a straight line. What is the

1.	A car is moving with a constant speed on a straight line. What is the net work done by the external force on the car?
Answer» Solution :SINCE there is friction between the tyres and the ROAD, work done by the EXTERNAL force is positive and is EQUAL to `"force" xx DISPLACEMENT`. If friction is not considered, work done = 0.