Question

KE of a system can be increased without applying any external force to the system.

• A. True
• B. False

Answer 1

The correct option is A True

1. Consider an isolated system of two objects falling towards each other. The only force acting on the ball is gravity. The net force of the system is zero, but the speed of the objects keeps on increasing.
2. If the velocity of the object increases, then the kinetic energy also increases without applying any external forces to the system.
3. Hence, the given statement is True.