Types of Constrained Motion:
(a) Completely constrained motion :
Completely constrained motion is a type of constrained motion in which relative motion between the links of a kinematic pair occurs in a definite direction by itself, irrespective of the external forces applied.
Example : Square bar moving in square hall
(b) Incompletely constrained motion :
In incompletely constrained mthoetrieolna,tivemotion links depend on the between the direction of external forces acting on them. A good example of incompletely constrained motion is the motion of a shaft inside a circular hole. Depending on the direction of external forces applied, the shaft may slide or turn (or do both) inside the circular hole. The motion is take place in more than one direction.
Example: Circular bar in circular hole
(c) Successfully constrained motion :
A kinematic pair is said to be partially or successfully constrained if the relative motion between its links occurs in a definite direction, not by itself, but by some other means.
A good example of successfully constrained motion is piston reciprocating inside a cylinder in an internal combustion engine. The motion is not completed by itself but by some other means.
Example: Motion of piston inside the cylinder is due to the rotation of the crank, Foot Step Bearing.
