Theory of Machine
In a simple harmonic motion, the velocity vector with respect to displacement vector

Leads by 90°
Is in phase
Lags by 90°
Leads by 180°

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

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.
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.

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Theory of Machine
A body in motion will be subjected to Coriolis acceleration when that body is

Restrained to rotate while sliding over another body
In plane motion which is a resultant of plane translation and rotation
In plane rotation with variable velocity
In plane translation with variable velocity

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