The torque required to overcome viscous resistance of a collar bearing is (where

Question

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

Options:

A . (μπ²N/60t) × (R₁ - R₂)

B . (μπ²N/60t) × (R₁² - R₂²)

C . μπ²N/60t) × (R₁³ - R₂³)

D . (μπ²N/60t) × (R₁⁴ - R₂⁴)

Answer: Option D

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