In block brakes with long shoe, equivalent coefficient of friction is given by
Where, 2θ= block angle, µ=Coefficient of friction
लंबे शु के साथ ब्लॉक ब्रेक में, तुल्यांक घर्षण गुणांक निम्न द्वारा दिया जाता है
µ[(4sinθ)/(2θ+sin2θ)]
µ[(2sinθ)/(2θ+sin2θ)]
µ[(4sinθ)/(θ+sin2θ)]
µ[(4sinθ)/(2θ+sinθ)]
µ[(4sinθ)/(2θ+sin2θ)]
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