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

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

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Theory of Machine
Lower pairs are those which have

Surface contact between the two elements when in motion
Point or line contact between the two elements when in motion
Elements of pairs not held together mechanically
Two elements that permit relative motion

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Theory of Machine
The direction of Coriolis component of acceleration is the direction

Along the centripetal acceleration
Along tangential acceleration
Of relative velocity vector for the two coincident points rotated by 90° in the direction of the angular velocity of the rotation of the link
Along perpendicular to angular velocity

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