PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
When two objects collide elastically, which of the following combinations of kinetic energy and momentum is correct?
(1) Kinetic energy = conserved; momentum = conserved
(2) Kinetic energy = not conserved; momentum = conserved
(3) Kinetic energy = conserved; momentum = not conserved
(4) Kinetic energy = not conserved; momentum = not conserved