Theory of Machine
A system of masses rotating in different parallel planes is in dynamic balance if the

Resultant couple is equal to zero
Resultant force is numerically equal to the resultant couple, but neither of them need necessarily be zero
Resultant force is equal to zero
Resultant force and resultant couple are both equal to zero

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Theory of Machine
Effort of a governor is the

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

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