Question

A truck and a car are moving with the same kinetic energy on a straight road. Their engines are simultaneously switched off. Which one will stop at a lesser distance?

Answer 1

Explanation

1. Given that the kinetic energy of both the truck and car is same.
2. As we know,
3. Distance$=\frac{K.E.}{F_r}$
4. Where, $F_r$ is the retarding force which is equal to the frictional force.
5. Since the mass of the truck is more than that of car so it's frictional force will be more that of car.

Hence, the truck will come at rest at a lesser distance.