Theory of Machine
A foot step bearing and rotor of a vertical turbine form examples of

Completely constrained motion
Partially constrained motion
Incompletely constrained motion
Successfully constrained motion

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Theory of Machine
Angle of descent of cam is defined as the angle

Through which the cam rotates during the period in which the follower remains in the highest position
Of rotation of the cam for a definite displacement of the follower
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position
During which the follower returns to its initial position

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