Full Specification ( Law of Conservation of Mass ):

The apparatus consists of an attractive and durable curved track grooved in the middle on which rolls a steel ball, can be clamped on the table. A leveling screw is provided under the base to make the lower end of track horizontal. The track carries an adjustable automatic release system to permit setting of the ball at exactly the same starting point for multiple runs. An adjustable support attached to base holds the second ball directly in the path of the first, or displaced from the path to cause the collision to occur at different angles and angles and at different distances from the end of the track.