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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(¼²N/60t) (R - R)
- B(¼²N/60t) (R² - R²)
- C¼²N/60t) (R³ - R³)
- D(¼²N/60t) (R´ - R´)
Correct answer: D
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CCommunity
(¼²N/60t) (R´ - R´)