PIRA Classification: 1N30.55
Description: A low friction cart contains masses allowed to oscillate along horizontal rods. The masses can be kept in place with a 'control' rod. When the cart collides with an object (in this case, a rod anchored to the table) while the masses are fixed, it experiences an elastic collision. When the masses are allowed to move, the cart experiences an inelastic collision.
Special Instructions: Don't give the cart a large initial velocity.
Condition: OK
Setup time: 3 minutes
Safety Issues: None