Theory of Machine
If some links are connected such that motion between them can take place in more than one direction, it is called

Partially constrained motion
Completely 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

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

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