A ball A collides elastically with another identical ball B with a velocity of 10 ms-1 making an angle of 30° with the line joining their centres C1 and C2. Select the correct statement(s).

Velocity components in common tangent direction will remain unchanged while velocity components in common normal direction are interchanged in case of an elastic collision. Hence, both A and B move at right angles after collision with vA=5ms−1 and vB=53ms−1. Kinetic energy is conserved in an elastic collision, whether it is a head on or an oblique collision.