For demonstrating unimpeded superimposition of motions. A launching rail with returning spring is mounted on a wooden base. Two steel balls are used as test bodies. Upon triggering, one ball starts to fall downwards and simultaneously the other is launched horizontally. Both balls hit the ground at the same time. Two holes in the base plate are provided for storing the balls.
Ball diameter: 15 mm
Dimensions: 200x120x30 mm3
Mass: 230 g approx