Theory of Machine
Two systems shall be dynamically equivalent when

M.I. of two about an axis through e.g. is equal
All of these
G. of two coincides
The mass of two are same

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Theory of Machine
In a single slider crank chain

Each of the four pairs is a turning pair
One is a turning pair and three are sliding pairs
Three are turning pairs and one is a sliding pair
Two are turning pairs and two are sliding pairs

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