In had on collision of equal masses, the velocities are interchanged. Can velocities in a head on collision be interchanged if the masses are not equal ?

The velocities in a head on elastic collision be interchanged"

In a head on elastic collision of two bodies of equal masses

Show that in case of one dimensional elastic collision of two bodies, the relative velocity' of sepa¬ ration after the collision is equal to the relative velocity of approach before the collision

In head on elastic collision of two bodies of equal masses, it is not possible :

Consider the following statements A and B. Identify the correct choice in the given answers A. In a one dimensional perfectly elastic collision between two moving bodies of equal masses the bodies merely exchange their velocities after collision. B. If a lighter body at rest suffers perfectly elastic collision with a very heavy body moving with a certain velocity, then after collision both travel with same velocity.

Two particles moving initially in the same direction undergo a one- dimensional , elastic collision . Their relative velocities before and after the collision are vec(v_(1)) and vec(v_(2)) . Which of the following is not correct?