Black Newton Balance Cardle with 5 Steel Ball for Home Decoration Painting Drawing Tips Rhinestone Picker for Christmas
Special Features
【Good Gift Idea】 Suit for both kids and adults, excellent for learning science, killing boring time and releasing stress, which makes it a good present for birthday,
【Material】 Solid steel ball, nylon plumb line, ABS plastic frames and base.
【Fitment】Suitable for the place such as office, desk table,computer table etc.c
【Used】Not only demonstrates a pendulum, but also shows the Laws of Conservation of Momentum and Energy.
【Controls】Pull up one ball and release,only one ball in the other side moves,pull up two, two balls will react, and so on.
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