A particle of weight W is placed on a rough plane which is inclined at an angle y to the horizontal. The coefficient of friction between the particle and the plane is where < tan . Show that the magnitude of the least horizontal force tan - W ÎĽ 9 F needed to maintain the particle in equilibrium is F=;
[tex] \frac{tan \beta - \alpha }{?} w \div 1 + \beta tan \alpha [/tex]
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