Question: The equivalent radius of a block brake is (a) (4 r sin theta /(sin theta+theta)) (b) (4 r sin (theta / 2) /(sin (theta /

The equivalent radius of a block brake is

(a) \(4 r \sin \theta /(\sin \theta+\theta)\)

(b) \(4 r \sin (\theta / 2) /(\sin (\theta / 2)+\theta / 2)\)

(c) \(4 r \sin (\theta / 2) /(\sin \theta+\theta)\)

(d) \(r \sin \theta /(\sin \theta+\theta)\)

where \(r=\) drum radius.

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