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Phun Physics: Pencil Drop

Phun Physics: Pencil Drop

This classroom demonstration illustrates the concept of inertia. A large wooden crochet hoop is balanced on the lip of a glass soda bottle. A pencil is then balanced atop the hoop. The pencil remains stationary until the demonstrator yanks the hoop in a downward angle. Performed properly, the pencil should drop directly into the soda bottle below. The page contains photos and background information on the physics fundamentals (in this case, Newton's First Law of Motion). Performed incorrectly, the demo still illustrates the effects of a net external force on a stationary object. Phun Physics is a collection of physics demonstrations which introduce basic physics topics, are approximately 45 minutes long, and can be varied for presentation to grades 3-12. <b>See Related Items</b> for a link... Show More


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