Q.

The frictional torque transmitted in a truncated conical pivot bearing, considering uniform pressure, is

• A(1/2). μ W cosecα (r₁ + r₂)
• B(2/3). μ W cosecα (r₁ + r₂)
• C(1/2). μ W cosecα [(r₁³ - r₂³)/(r₁² - r₂²)]
• D(2/3). μ W cosecα [(r₁³ - r₂³)/(r₁² - r₂²)]