Question

A ball falls on a wedge. The wedge is initially at rest. If the friction is absent everywhere and collision is elastic, then

• A. mechanical energy as well as momentum is conserved in all direction.
• B. mechanical energy is conserved but momentum is not conserved in all directions.
• C. mechanical energy as well as momentum is not conserved.
• D. mechanical energy is not conserved but momentum is conserved in all directions.

Answer 1

The correct option is B mechanical energy is conserved but momentum is not conserved in all directions.

Momentum is not conserved in vertical direction due to gravity.