Theory of Machine
A spring controlled governor is found unstable. It can be made stable by

Increasing the ball mass
Decreasing the ball mass
Decreasing the spring stiffness
Increasing the spring stiffness

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

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

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