Question

A block of mass m is kept on a moving block of mass M in such a way that M moves but m remains at rest with respect to M. Then –

• A. Momentum of m must not be zero in any frame
• B. Kinetic energy of m must not be zero in any frame
• C. Kinetic energy and momentum may be zero in a frame
• D. None of the above

Answer 1

Answer: (C)

Kinetic energy and momentum may be zero in a frame

Answer 2

Conceptual.