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Your cart is empty.Stand with a receptacle for a ball at the top. 18 mm ball, a square piece of sheet metal and a trigger of sheet metal included. Pulling and releasing the trigger causes the square sheet to slide out from under the ball, dropping the ball in the receptacle by inertia.
bbthescienceguy
Reviewed in the United States on April 30, 2015
Simple, effective and inexpensive. This device is perfect for a quick, hands on demonstration of inertia.
Dawn Schnell
Reviewed in the United States on September 3, 2014
There are no instructions with this item. I'd like to use it with my class but the description on the selling page is so thin, it is not useful.
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