Select a tube which is slightly larger in diameter than the balls. Drop both balls in the top of the vertical tube. A similar bouncing effect can be observed. Tape markers can be applied to the outside of the tube to indicate bounce height. The mass of the golf ball is much greater than the mass of the ping pong ball.
Students experience conservation of momentum with a baseball and bat.
The much more massive bat imparts a greater velocity on the baseball. Collect balls of various sizes and masses. Some balls which could be used are baseballs, large ball bearings, small rubber balls and other ping pong balls. Students should predict which ball will allow the ping pong ball to bounce higher when the activity is repeated. Repeat the activity and compare the predictions to the outcomes.