Theory of Machine
For dynamic balancing of a shaft

The net dynamic force acting on the shaft is equal to zero
Both (A) and (B)
The net couple due to the dynamic forces acting on the shaft is equal to zero
None of these

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Theory of Machine
The maximum fluctuation of energy is the

Ratio of the mean resisting torque to the work-done per cycle
Sum of the maximum and minimum energies
Variations of energy above and below the mean resisting torque line
Difference between the maximum and minimum energies

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