DESCRIPTION: Newton's Cradle / Pendulum Balls is made JUST FOR YOU Great gift for kids & adults - entertainment via the law of conservation of energy Sturdy & well-made - reinforced strings, stainless steel construction No more tangle! - strings are guaranteed to be tangle-free upon arrival Swing one or two spheres, and then loosen your grip, because of conservation momentum and energy the other one or two balls on the opposite side will move to the same distance! If you feel upset, swing two or three balls at the same time. It can make you calm FEATURES: Not only demonstrates a pendulum, but also shows the Laws of Conservation of Momentum and Energy Pioneering developments for several years, we have been focusing on the exquisite technologies and physics tools. This classic desktop toy provides you many benefits and entertainments, is suitable for various locations such as house or office, and is an intriguing device that not only demonstrates pendulum motion, but also helps to show the laws of Conservation of Momentum and Energy. Whether you are studying physics knowledge, working on complex analysis, or looking for a delicate gift, this goods is definitely what you really want Size(LxWxH): Approx. 6.3"*4.53"*3.35" Package Includes: 1 Set Pendulum Balls
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