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Unread 31-12-2002, 17:02
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Quote:
Originally posted by Suneet
Humn. If my understanding is correct, the two strips will have the same resistance to sliding motion caused by friction, as long as the pair of surfaces involves the same materials, and the *normal force between the strip and the ground is the same*. The 1mm tire and 1m strip do not have similar normal forces with the carpet. If you did this by placing different width strips under the same weights and dragging the weight with only the strip in contact with the ground, the force of friction would be the same in the two cases.
Yes, they do. If you look at my post, I specified that they have the same mass, thus the same normal force. (Please don't say this isn't true. N=mg).

Anyway, there's a reason I posted in Q&A: none of the info here is anything new to me. What I'm asking is how will increasing our surface area increase our traction/friction/whatever you want to call it. If we double the width of our wheel, for example, does our traction double? Does it go up by root 2? The cube root of 2? Or is it not possible to quantify?
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