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Physics, Astronomy & Cosmology / How can a skateboarder move without pushing anything?
« on: 14/05/2010 06:39:45 »
The skateboarder does actually push against the wheels friction against the surface. This can give an acceleration in the direction of the push. It is similar the push you get by pumping a swing. It is the same push you get when skating with roller skates or skis. You push from side to side and convert your side to side energy to forward motion.