Two planes are hinged together on one end and the free end of the upper plane can be lifted. There is a niche at the free end of the upper plane to support a small ball. A can is attached on the upper plane a few inches from the ball. The upper plane is raised to an angle so that the ball is directly over the point occupied by the can when the plane is at its horizontal position. When the upper plane is released, the ball support (the niche) and the can suffer an acceleration greater than g and break away from the ball. The can arrives at the horizontal position in time to catch the more slowly falling ball. The ball appears to jump into the can.

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