Large Hoberman’s Sphere

Demo Number	142
Location	Shelf 19
Description	This demonstrates conservation of angular momentum for a collapsing and expanding sphere.
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Tips	Operation: Suspend the Hoberman sphere and pulley assembly. Start it turning in the open position. Pull on the lower string to collapse the sphere and note how the sphere spins much faster. The string can be released to let the sphere expand again. Hold sphere yourself and have student pull the string.

Colorado State University