Question

What makes some collisions elastic and others inelastic?
A) If there is no loss of kinetic energy in the collision, it is inelastic.
B) If there is energy lost in the collision to sound, heat, etc., the collision is inelastic.
C) If the collision involves bouncing, it is elastic.
D) If the collision involves sticking together, it is elastic.

Answer 1

I think the answer is B, but I would like clarification

Answer 2

You’re correct. By definition inelastic collisions involve some loss of kinetic energy to other forms of energy.