Theory of Machine
The steering of a ship means

Movement of a complete ship up and down in vertical plane about transverse axis
Rolling of a complete ship sideways
Turning of a complete ship in a curve towards right or left, while it moves forward
None of these

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

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