Newton Cradle Balance Ball Physics Science stand
-Brand new and high quality.
-Not only demonstrates a pendulum but also shows the Laws of Conservation of Momentum and Energy.
-Friction and damping effects are also observed.
-Often used as a toy to amuse people.
-Includes steel balls plastic frames and base.
-Great gift for everyone.
-Unfold size:18cm x 11cm x 14cm
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