In the Newtonian Demonstrator / Newton's Crade (Economy Choice) for physical science and physics, demonstrate that for every action there is an equal and opposite reaction.
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Demonstrate that for every action there is an equal and opposite reaction. Lift and drop one ball to see one ball pop out from the other side. Lift two balls and two pop out. Leave this popular “toy” on your desk for a school year of enjoyment and learning.