Question

A particle of mass m strikes a wall with speed v at an angle ${30}^0$ with the wall elastically as shown in the figure. The magnitude of impulse imparted to the ball by the wall is :

• A. mv
• B. $\frac{mv}{2}$
• C. 2mv
• D. $\sqrt{3}$ mv

Answer 1

The correct option is A mv

Momentum changing to normal = impulse.

Impulse imparted $=2mv\sin 30°$

=mv