Theory of Machine
The C.G. of a link in any mechanism would experience

No acceleration
Linear acceleration
Both angular and linear accelerations
Angular acceleration

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Theory of Machine
In a hydrodynamic journal bearing, there is

A forced lubricant between the journal and the bearing
A thick film of lubricant between the journal and the bearing
No lubricant between the journal and the bearing
A very thin film of lubricant between the journal and the bearing such that there is contact between the journal and the bearing

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Theory of Machine
In elliptical trammels

One pair turning and three pairs sliding
Three pairs turning and one pair sliding
All four pairs are turning
Two pairs turning and two pairs sliding

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