In an eleastic collision

These questions consists of two statements each printed as Assertion and Reason. While answering these question you are required to choose any one of the following five responses. Reason: In an eleastic collision, the linear momentum of the system is conserved.

What happens in a eleastic collision of two identical bodies moving opposite to each other ?

In an inelastic collision, the kinetic energy after collision

Define elastic collision. Show thaat in an elastic collision, relative velocity of approach before collision is equal to relative velocity of separation after collisions.

Explain the total linear momentum is conserved in an elastic collision and also explain the inelastic collision and completely elastic collision .

prove that in an elastic collision the relative velocity of approach before collision is equal to relative velocity of separation after collision.

An alpha-particle of mass m suffers 1 -dimentinal eleastic collision with a nucleus at rest of unknown mass. It is scattered directly backwards losing 64% of its initial kinetic energy. The mass of the nucleus is :

An alpha-particle of mass m suffers 1 -dimentinal eleastic collision with a nucleus at rest of unknown mass. It is scattered directly backwards losing 64% of its initial kinetic energy. The mass of the nucleus is :