product description:
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
ATTENTION: please take out the balls one by one
please place the Newton s Cradle horizontally, and then the balls can move longer
Package：1*Newton s Cradle
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