The Bowling Ball Pendulum – The Wonders of Physics – UW–Madison - Swinging ball pendulum
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Newton's cradle is a device that demonstrates conservation of momentum and energy using a This restricts the pendulums' movements to the same plane. . But in a real Newton's cradle, the fourth ball swings out as far as the fifth ball. When you let go of the ball, it swings downward like a pendulum. As it starts swinging, the energy changes from potential energy to kinetic, or moving, energy.