Theory of Machine
When a point at the end of a link moves with constant angular velocity, its acceleration will have

Radial and tangential components both
Tangential component only
Coriolis component only
Radial component only

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Theory of Machine
A governor is said to be stable, if the

Radius of rotation of balls decreases as the equilibrium speed decreases
Radius of rotation of balls decreases as the equilibrium speed increases
Radius of rotation of balls increases as the equilibrium speed decreases
Radius of rotation of balls increases as the equilibrium speed increases

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Theory of Machine
The displacement of the reciprocating roller follower, when it has contact with the straight flanks of the tangent cam, is given by (where r₁ = Minimum radius of the cam, r₂ = Radius of the roller follower, and θ = Angle turned by the cam from the beginning of the follower displacement)

(r₁ + r₂) [(1 - cosθ)/cosθ]
(r₁ - r₂) (1 - cosθ)
(r₁ + r₂) (1 + cosθ)
(r₁ - r₂) [(1 - cosθ)/cosθ]

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Theory of Machine
Angle of dwell of cam is defined as the angle

Moved by the cam from the instant the follower begins to rise, till it reaches its highest position
Of rotation of the cam for definite displacement of the follower
During which the follower returns to its initial position
Through which the cam rotates during the period in which the follower remains in the highest position

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