Theory of Machine
The Ackermann steering mechanism is preferred to the Davis type in automobiles because

The former is having turning pair
The former is most rigid
The former is mathematically accurate
The former is most economical

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

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Theory of Machine
The sense of Coriolis component 2 ωv is same as that of the relative velocity vector v rotated at

45° in the direction opposite to the rotation of the link containing the path
45° in the direction of rotation of the link containing the path
180° in the direction opposite to the rotation of the link containing the path
90° in the direction of rotation of the link containing the path

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