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
cor, 0
0, 0
0, and more than co2r

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Theory of Machine
In a circular arc cam with roller follower, the acceleration in any position of the lift will depend only upon

Mass of cam follower linkage, spring stiffness and cam speed
Total lift, centre of gravity of the cam and cam speed
Total lift, total angle of lift, minimum radius of cam and cam speed
Radius of circular arc, cam speed, location of centre of circular arc and roller diameter

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