A billiard ball collides elastically with an identical stationary ball. The collision is not head on. Show that the directions of motion of the two balls are at right angles after the collision. Solve the problem in centre of mass frame as well as in lab frame.

A ball of mass m makes an elastic collision with another identical ball at rest. Show that if the collision is oblique, the bodies go at right angles to each other after collision.

A ball moving with velocity of 6 m/s strikes an identical stationary ball. After collision each ball moves at an angle of 30^(@) with the original line of motion. What are the speeds of the balls after the collision ?

A ball moving with a velocity of 12ms^(-1) collides with another identical stationary ball . After the collision they move as shown in figure . Find the speed of the balls after the collision . Also , decide whether the condition is elastic or not .

A ball moving at 9m *s^(-1) , collides with an identical ball at rest. After collision, both the balls scatter at 30^@ with the initial direction of motion. Find the velocity of each ball after collision. Does the kinetic energy remain conserved in such a collision ?

A ball of mass 1 kg moving along x-direction collides elastically with a stationary ball of mass m. The first ball (mass = 1 kg) recoils at right angle to its original direction of motion. If the second ball starts moving at an angle 30^(@) with the X-axis, then the value of m must be

The ball is released when the string is horizontal. The collision between the ball and the block is head - on elastic. The velocities of the ball and the block immediately after collision