Theory of Machine
The values of velocity and acceleration of piston at near dead center for a slider-crank mechanism will be

0, and less than coV
0, and more than co2r
cor, 0
0, 0

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Theory of Machine
The inversion of a mechanism is

Turning its upside down
Obtained by fixing different links in a kinematic chain
Obtained by reversing the input and output motion
Changing of a higher pair to a lower pair

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