PRINCIPLES: Conservation of linear momentum.

DESCRIPTION: The majority of the momentum will be transferred to the smallest ball which bounces up with a large velocity due to its small mass.

SUGGESTIONS: An alternate version of this demonstration can be done using a basketball and tennis ball, though practice will be required to make sure they can be dropped simultaneously while the tennis ball stays on top of the basketball. Use caution so you do not break lights or anything else on the ceiling

EQUIPMENT: Triple ball launcher, or a basketball and a tennis ball.

SETUP TIME: 5 min.

KEYWORDS: conservation of linear momentum