For a shoe brake, the equivalent coefficient of friction is equal to (where μ = Actual coefficient of friction, and θ = Semi-block angle)

For a shoe brake, the equivalent coefficient of friction is equal to

1.	For a shoe brake, the equivalent coefficient of friction is equal to (where μ = Actual coefficient of friction, and θ = Semi-block angle)
A.	2μ sinθ/(θ + sinθ)
B.	μ sinθ/(2θ + sin 2θ)
C.	4μ sinθ/(θ + sinθ)
D.	4μ sinθ/(2θ + sin 2θ)
Answer» E.

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For a shoe brake, the equivalent coefficient of friction is equal to (where μ = Actual coefficient of friction, and θ = Semi-block angle)

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