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

μπ²N/60t) × (R₁² - R₂²)

π²N/60t) × (R₁³ - R₂³)

μπ²N/60t) × (R₁⁴ - R₂⁴)

The torque required to overcome viscous resistance of a collar bearing

1.	The torque required to overcome viscous resistance of a collar bearing is(where R1 and R2 = External and internal radius of collar)
A.	μπ²N/60t) × (R₁ - R₂)
B.	μπ²N/60t) × (R₁² - R₂²)
C.	π²N/60t) × (R₁³ - R₂³)
D.	μπ²N/60t) × (R₁⁴ - R₂⁴)
Answer» E.