There's several parts to this question which I have been able to complete successfully , however I am having difficulties with the following ;
e. Show , further , that equilibrium is only possible when ?>?c , where
?c = ((40/81) - (4/3)*sin alpha +sin^2 alpha)/(-1/3 +cos&)
The hint is that the magnitude of F (which we know) = m?c * N . I cant' seem to form the ?c equation using this hint .
magnitude of f = ((40/81) - (4/3)*sin alpha +sin^2 alpha)
N=mg(-1/3 +cos alpha)
Note the ? are supposed to represent the symbol for the coefficient of static friction .
Thank you for your help .
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