Features: Principle: Not only demonstrates a pendulum, but also shows the Laws of Conservation of Momentum and Energy. Pull back one or more of the balls and let them drop down. Enjoy the clicking sound and soothing motion of the metal balls as they slow to a standstill. A Brief History Newton's cradle, named after Sir Isaac Newton, is a device that demonstrates three main physics principles: conservation of energy, conservation of momentum and friction via a series of swinging spheres. Most people think that Isaac Newton invented the apparatus commonly called a Newton's Cradle, but he didn't. English actor Simon Preble invented the device in 1967 and named it in honor of Newton. In 1968 the first portable version hit the market and quickly gained popularity around the world as a fun, educational physics demonstrator. Attention: Friction and damping effects are inevitable
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