Video Index
Please make sure you play the Video before clicking the links below.
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Measuring Static Friction
Demonstration using a wooden ramp of the dependence of μs on surface, but not surface area or mass.
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Pulley/Plane Demo
Demonstration of pulley/plane system; additional mass hangs, then falls; explanation of changing friction.
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Waterplaning and Air Tracks
Explanation of how friction can be eliminated by hydroplaning and air tracks, with brief demonstrations.
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CO2 Shuttle
Video of a device that travels on cushion of CO2 on plate glass; the friction is so low a flea can pull a large book on the device.