When a light beach ball rolling with a speed of 6 m/s collides with a heavy exercise ball at rest, the beach ball's speed after the collision will be approximately
A) 3 m/s.
B) 0.
C) 6 m/s.
D) 18 m/s.
E) 12 m/s.

Question

Quizplus · Accepted Answer

The beach ball, being much lighter than the exercise ball, will essentially bounce back with a speed very close to its original speed due to the conservation of momentum and energy, assuming an elastic collision. The heavy exercise ball will absorb very little of the beach ball's kinetic energy due to its much greater mass.

When a Light Beach Ball Rolling with a Speed of 6