A shell of mass m is moving horizontally with velocity `v_(0)` and collides with the wedge of mass M just above points A, as shown in the figure. As a consequences, wedge starts to move towards left and the shell returns with a velocity in xy-plance. The principle of conservation of momentum can be applied for

Options

A. system (m + M) along any direction
B. system (m+M) along vertical
C. system (m + M) horizontally
D. None of the above

Answer

C

Explanation

In horizontal direction, net force on the system is zero. Therefore, principle of conservation of momentum can be applied for system (m+M) horizontally.