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This question belongs to Mechanical Engineering Hydraulics And Fluid Mechanics In ME

Hydraulics and Fluid Mechanics in ME

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The torque required to overcome viscous resistance of a collar bearing is (where R₁ and R₂ = External and internal radius of collar)

A) $$\frac{{\mu {\pi ^2}{\text{N}}}}{{60{\text{t}}}}\left( {{{\text{R}}_1} - {{\text{R}}_2}} \right)$$ B) $$\frac{{\mu {\pi ^2}{\text{N}}}}{{60{\text{t}}}}\left( {{\text{R}}_1^2 - {\text{R}}_2^2} \right)$$ C) $$\frac{{\mu {\pi ^2}{\text{N}}}}{{60{\text{t}}}}\left( {{\text{R}}_1^3 - {\text{R}}_2^3} \right)$$ D) $$\frac{{\mu {\pi ^2}{\text{N}}}}{{60{\text{t}}}}\left( {{\text{R}}_1^4 - {\text{R}}_2^4} \right)$$

Answer & Solution

Correct Answer: Option D

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