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#6
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To clarify:
f=uN for simple surfaces. This does not involve area. However, for FIRST, area DOES matter. For example, try dragging a 1mm wide tire accross carpet and then try a 1m wide strip. Assuming both have the same mass, or at least the same net force acting into the carpet, the 1m wide will be harder to pull. My question is why. To wysywig: the traction vs friction thing doesn't really make much sense to me. If the traction is not from friction, where does the force come from? Forces can't appear out of nowhere. As to the edge thing, are you saying that each edge provides a small part of the net force so more edges equals more net force? In that case, area does matter as the edges are nothing more than area. |
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