Momentum

The visitor is presented with a series of bouncing balls neatly aligned on top of each other with a guide wire. Visitors release the balls and as they fall downwards, the kinetic force of each ball is transferred to the ball above it as it hits the ground. The mass of the balls decreases as you move upwards, the speed of the balls must increase to maintain linear momentum. As a result, the top ball on the wire flies upwards.