Question

Describe the collision moment

Answer 1

In collisions between two isolated objects Newton's third law implies that momentum is always conserved. ... Collisions in which the kinetic energy is also conserved, i.e. in which the kinetic energy just after the collision equals the kinetic energy just before the collision, are called elastic collision.

Answer 2

A perfectly elastic collision is defined as one in which there is no loss of kinetic energy in the collision. ... Momentum is conserved in inelastic collisions (as it is for elasticcollisions), but one cannot track the kinetic energy through the collision since some of it is converted to other forms of energy