Question

Quick Physics Questions! Will give medal!!
Which of these is the best example of an elastic collision?
A rubber ball is dropped from 1.2 m and bounces back up to a height of 0.8 m.

A billiard ball strikes another of the same mass at rest and stops, and the second ball then moves with the same velocity as the first ball.

A cart rams a similar cart and latches onto it with a loud clack.

A cart rams another with a compressed spring, which is released, pushing them apart.
Two objects, A and B, each of mass 0.22 kg, are moving at 0.52 m/s directly toward each other. A completely inelastic collision occurs and both objects stop. What percentage of the total kinetic energy is changed into other forms of energy?

Answer 1

The best example of an elastic collision from above is that of a cart which rammed into another one and they are now pushed apart. The last option is the correct answer. An elastic collision occurs when two objects bounce apart when they collide thus, preserving kinetic energy and momentum.