Theory of Machine
When there is a reduction in amplitude over every cycle of vibration, then the body is said to have

Forced vibration
Free vibration
Under damped vibration
Damped vibration

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Theory of Machine
Effort of a governor is the

Mean force exerted at the sleeve for maximum equilibrium speed
Work-done at the sleeve for maximum equilibrium speed
None of these
Mean force exerted at the sleeve for a given percentage change of speed

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