A common piece of physics lab equipment is a device called a "fan cart." Perhaps you used one yourself when you were in high school of college? A fan cart is essentially a low-friction dynamics cart, commonly used to study motion, momentum, energy, etc., fitted with a motor and propeller or "fan."...
By: bclamore
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from Instructables: exploring - technology - robots http://ift.tt/1MxfLGn
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