Newton's Cradle

Newton's Cradle demonstrates the conservation of momentum and energy. When one of the outer balls is lifted and released, it strikes the next ball, transferring its energy through the stationary balls in the middle. This causes the ball on the opposite end to swing outward with nearly the same speed, while the initial ball stops. The process then reverses, repeating the motion. Essentially, the cradle visually illustrates how energy and momentum pass through objects in a nearly elastic collision, maintaining the system's overall energy and momentum without significant loss.