Theory of Machine
The rotating shafts tend to vibrate violently at whirling speeds because

Resonance is caused due to the heavy mass of the rotor
Bearing centre line coincides with the axis
The shafts are rotating at very high speeds
The system is unbalanced

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Theory of Machine
A motor car moving at a certain speed takes a left turn in a curved path. If the engine rotates in the same direction as that of wheels, men due to centrifugal force

The reaction on me inner wheels increases and on the outer wheels decreases
The reaction on the outer wheels increases and on the inner wheels decreases
The reaction on the front wheels increases and on the rear wheels decreases
The reaction on the rear wheels increases and on the front wheels decreases

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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 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 zero acceleration

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