Air Puck

This puck glides on a cushion of air over any smooth surface, even low-pile carpets. The puck's nearly frictionless motion makes it the perfect tool for studying conservation of momentum, elastic and inelastic collisions, and coefficients of friction. A thick foam bumper protects the puck and other objects from damage during collisions.

Requires 4 AA batteries (such as item #756316, not included). Dimensions, 19 cm diam x 6 cm H.