Description

One drilled and the other solid are used to explain the second law of motion. Consists of al spring loaded steel rod mounted on a metal base and one solid steel sphere and one steel sphere along with the hole. The internal spring accelerates one ball and releases the other when the release lever is triggered, depicting that two balls when dropped from same level strike the ground simultaneously even when the balls are released one is travelling forward. Support stand and clamp is required but not included. With instructions.