Second Law of Motion Unit

Demonstrate Newton's Second Law of Motion. This unit consists of a 2.5 cm wide, 46 cm long steel strap that clamps easily to the edge of a lab table with a small vise. The two 2cm steel balls sitting in the crossbar at one end of the strap are released simultaneously with one ball dropping vertically and the other ball projected horizontally. As students observe both balls striking the floor at the same time, they realize the significance of Newton's second law of motion. Gravity has the same effect on a projectile as on a body falling vertically. This apparatus is an ideal demonstration device for educators.