A ball is moving with speed $12\text{m/s}$ towards a heavy wall which is moving towards the ball with the speed $10\text{m/s}$ as shown in figure. Assuming collision to be perfectly elastic, find the speed of ball after the collision.

Q. A ball is moving with a speed of $5\text{m/s}$ towards a heavy wall which is moving towards the ball with speed $2\text{m/s}$ as shown in figure. Assuming the collision to be perfectly elastic, find the speed of the ball and speed of the wall immediately after the collision.

Q. A ball is moving with a speed of $5\text{m/s}$ towards a heavy wall which is moving towards the ball with speed $2\text{m/s}$ as shown in figure. Assuming the collision to be perfectly elastic, find the speed of the ball and speed of the wall immediately after the collision.

Q. A ball is moving with velocity $2\text{m/s}$ towards a heavy wall approaching the ball with a speed $1\text{m/s}$ as shown in figure. Assuming collision to be elastic, find the velocity of the ball immediately after the collision.
(Considering the initial direction of motion of ball to be $+ve$).

Q. A ball moving at a speed of $3\text{m/s}$ approaches a wall moving towards it with a speed of $3\text{m/s}$. After the perfectly elastic collision, the speed of the ball will be

Q. A ball of mass $10\text{kg}$ initially at rest starts moving under the influence of a constant force $50\text{N}$. Ball covers $10\text{m}$ before colliding a heavy wall which is moving towards the ball with speed $10\text{m/s}$ as shown in figure. If force stops acting on ball just before collision and collision is perfectly elastic, find the velocity of ball after collision.