This classic demonstration delivers the wow-factor that makes abstract physics concepts unforgettable. Shoot a 25-mm steel ball from a barrel affixed to a moving cart and watch in amazement as it drops back down into the barrel. Kids will learn that the forward motion (horizontal velocity) of a ball ejected vertically is the same as that of the cart from which it was ejected.
The barrel has two spring tension settings. Complete with a 25-mm steel ball and release pin.
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