Theory of Machine
The example of lower pair is

All of these
Straight line motion mechanisms
Shaft revolving in a bearing
Automobile steering gear

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Theory of Machine
The maximum fluctuation of energy is the

Ratio of the mean resisting torque to the work-done per cycle
Sum of the maximum and minimum energies
Difference between the maximum and minimum energies
Variations of energy above and below the mean resisting torque line

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