AP EAPCET 23-Aug-2021 Shift 2 Paper

We know that, coefficient of restitution, for collision between two objects is e=

v2−v1

u1−u2

=

Relative velocity of separation

Relative velocity of approach

which gives, e=1 (for elastic collision)
e=0 (for perfectly in-elastic collision)
0<e<1 (for inelastic collision)