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posted by  ThereIS_a_CaKe on 11/7/2009 12:52:49 PM  |  status: Closed  |  Earned Karma: 27

CIRCULAR MOTION, frequency problem --->PLEASE HELP, WILL RATE HIGH!!!!!

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N/A N/A N/A N/A 11/16/2009 at 8:00:00 AM
Question Details:
A gravitron ride at a fair consists of a large cylinder of radius 15.0m, spinning about its vertical axis of symmetry. The rider is held to the inner cylinder wall by static friction as the bottom of the cylinder is lowered. If the coefficient of static friction between the wall and rider is 0.8, then how many revolutions per minute must the cylinder execute?
If you can't solve that one problem, put your calculator down, assume the party escort position. You will be taken to your party, where there will be cake!

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posted by Physics-Ga on 11/7/2009 3:52:00 PM  |  status: Live
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Response Details:
μ Fc = m g        where μ Fc   is the frictional force supporting the rider
Fc = m v2 / R = m ω2 R
ω = √(g / (μ R)) = .904 / sec
f = ω / (2 π) = .144 / sec = 8.63 / min
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posted by ThereIS_a_CaKe on 11/7/2009 6:44:48 PM  |  status: Live
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Response Details:
just one question, what does the little w symbol stand for? Everything else i understand fully.
If you can't solve that one problem, put your calculator down, assume the party escort position. You will be taken to your party, where there will be cake!
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