Question

A train and a car travelling with the same kinetic energy, are brought to rest by applying the same force. Which object will travel more distance before coming to rest?

• A. The car
• B. The train
• C. Both would require the same distance
• D. Cannot be decided with the given information

Answer 1

The correct option is C

Both would require the same distance

The energy of the car and the train are equal. Hence, the work done to bring them to rest will be equal. Work done = force $\times$ distance.

Since the forces on them are equal, the distance travelled by them will also be equal.