question_answer

A truck and a car moving with the same K.E. are stopped by applying same retarding force by means of brakes. Which one will stop at a smaller distance?

Answer:

                Both the truck and the car will stop at the same distance. This follows from work energy principle K.E. = work done in stopping = force × distance. As K.E. of both and retarding force applied on both are equal, therefore, the distances covered must by equal.