The Falling Bodies Apparatus demonstrates the effect of gravity on falling bodies.The L-section launcher has holes for locating two 19 mm diameter steel balls which act as projectiles. The launcher is released by push button and projects one ball forward while allowing the other to fall freely.The launching mechanism is mounted on wooden block which may be clamped to the bench and has a convenient storage pocket for the balls .2 spheres included Sphere Material: SteelDimensions: 180 x 60 x 30mm