Theory of Machine
When a slider moves on a fixed link having curved surface, their instantaneous centre lies

At the centre of circle
At the pin joint
At the centre of curvature
On their point of contact

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Theory of Machine
Which of the following property of the instantaneous center is correct?

All of these
A rigid link rotates instantaneously relative to another link at the instantaneous centre for the configuration of the mechanism considered.
The two rigid links have no linear velocity relative to each other at the instantaneous centre.
The velocity of the instantaneous centre relative to any third rigid link is same whether the instantaneous centre is regarded as a point on the first rigid link or on the second rigid link.

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Theory of Machine
In a mechanism, the fixed instantaneous centers are those centers which

Vary with the configuration of the mechanism
None of the listed here
Remain in the same place for all configurations of the mechanism
Moves as the mechanism moves, but joints are of permanent nature

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