Theory of Machine
For dynamic balancing of a shaft

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

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Theory of Machine
A thin circular disc is rolling with a uniform linear speed, along a straight path on a plane surface. Which of the following statement is correct in this regard?

The centre of the disc has centrifugal acceleration
The centre of the disc has zero acceleration
All points of the disc have the same velocity
The point on the disc making contact with the plane surface has zero acceleration

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