It demonstrates collision & parabolic trajectories. The tube (hunter’s gun) is a spring loaded launching piston allowing to adjust launch angle of ball. An electromagnet, which is battery operated, attracts a ball (monkey). After firing the projectile, the electromagnet circuit breaks, the ball falls & collision between projectile & ball occurs. An angle mirror situated at right side speeds the aiming process. A mounting plate is provided for “hunter’s gun”. Supplied complete with launcher, electromagnetic free fall unit, two no. of projectile balls, angle mirror accessory & instruction manual. Supplied without support stand & 1.5 V dry cell.