JoyTech Acrylic Newton’s Cradle Balance Desk Decor Collision Balls Decompression Science Psychology WJ202

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About JoyTech Acrylic Newton’s Cradle Balance Desk

Features: Size: 16*8.8*11.8cm / 6.3* 3.46* 4.65 in. Weight: 350 g / 12.38 oz. Material: Acrylic+ Metal + Nylon threads. Package Content: 1*Newton's cradle. Attention: 1. It is not an item that never stops working. The balls continue in perpetual motion for ONLY 15-25 SECONDS due to the resistance of the air and friction if you know more about the law of energy conservation, you will not ask why. 2. The string may get tangled if not suitable playing. Please open package and play in a gentle manner to avoid tangled.   History of the toy 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.  Newton's cradle is a device that demonstrates conservation of momentum and energy using a series of swinging spheres. When one on the end is lifted and released, it strikes the stationary spheres; a force is transmitted through the stationary spheres and pushes the last one upward. The device is also known as Newton's balls or Executive Ball Clicker.