Two 2-m/s pool balls roll toward each other and collide. Suppose after bouncing apart each moves at 4 m/s. This collision violates the conservation of
A)momentum.
B)energy.
C)both momentum and energy.
D)none of the above

Question

Quizplus · Accepted Answer

The collision violates the conservation of energy because the total kinetic energy of the system increases, which is not possible in an elastic collision without an external force doing work on the system.

Two 2-M/s Pool Balls Roll Toward Each Other and Collide