Learn about new technologies!

What is the correct answer?


A ball moving on a smooth horizontal table hits a rough vertical wall, the coefficient of restitution between ball and wall being 1/3. The ball rebounds at the same angle. The fraction of its kinetic energy lost is

A. 1/3

B. 2/3

C. 1/9

D. 8/9

Please do not use chat terms. Example: avoid using "grt" instead of "great".