Theory of Machine
Angular acceleration of a link can be determined by dividing the

Centripetal component of acceleration with length of link
All of these
Resultant acceleration with length of link
Tangential component of acceleration with length of link

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Theory of Machine
In a band and block brake, the ratio of tensions on tight side and slack side of the band is (where μ = Coefficient of friction between the blocks and the drum, θ = Semi-angle of each block subtending at the center of drum, and n = Number of blocks)

T₁/T₂ = [(1 + μ tanθ)/(1 - μ tanθ)]n
T₁/T₂ = [(1 - μ tanθ)/(1 + μ tanθ)]n
T₁/T₂ = (μ θ)n
T₁/T₂ = μ. θ. n

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