Express your equation as
mu_s*(cos(\alpha))-sin(\alpha)=-mg/F
Remembering that
mu_s is (Tan(\theta))
This is then a double angle formula in Cosine
Now to get back to my game of space quest, where the mop has a negative angle of friction!!
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Last edited by YellowPeril; Oct 5th 2009 at 10:03 AM.
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