Show that in the case of one dimensional elastic collision , the relative velocity of approach of two colloding bodies before collision is equal to the relative velocity of separation after collosion .

In two separate collisions, the coefficient of restitutions d) A is false but B is true e and e are in the ratio 3: 1. In the first collision the relative velocity of approach is twice the relative velocity of separation, then the ratio between relative velocity of approach and the relative velocity of separation in the second collision is,

Two particles of equal masses have an elastic collision, the target particle being initially at rest. If it were not a head - on collision, the directions of their motion after the collision are