For Dynamic Balancing of a Shaft

Answer: C :Both (a) and (b)

For dynamic balancing of a shaft, the net dynamic force acting on the shaft is equal to zero, and the net couple due to the dynamic forces acting on the shaft is equal to zero.

Solution:

A system is said to be dynamically balanced if two conditions are satisfied.

1. The resultant of all the dynamic forces acting on the system during rotation must be zero.
2. The resultant couple, due to all the dynamic forces acting on the system during rotation, about any plane, must be zero.

Hence, option c is correct.

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