A bicycle rider accelerates from rest up to full speed on a flat, straight road. The frictional force between the road and the tires pushing her forward is f1. The air drag (and other frictional forces) pushing back is f2. What relationship would f1 and f2 have in the first few seconds of the ride then After she has reached full speed?
My answer: For the first one, I thought F2 would have been greater than f1, but then I realized that if it was, it would have been going backwards, so I decided that f1 is greater than f2 because it is moving forwards. Then, for the second part, I think that after she has reached full speed, it would be f1=f2, but I don't really have any reasoning. I just assumed that at that point, they'd be equal.
Any help or suggestions for figuring it out (please don't just give me an answer; I really need help understanding this stuff).
2007-03-15
15:34:10
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3 answers
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asked by
Nikita R
2
in
Science & Mathematics
➔ Physics