Which of the following is not the type
of incompletely constrained motion?
Shaft with collars in a circular hole
Shaft in a foot step bearing
Square bar in square hole
All options are correct
All options are correct
●Shaft with collars in a circular hole is an example of successfully constrained motion, because in this, desired motion is obtained by external means (collar).
●Shaft in a foot step bearing is above example of successfully constrained motion. A shaft in a foot step bearing may have vertical motion apart from rotary motion, but due to load applied on the shaft it is constrained to move in that direction.
●Square bar in square hole is example of completely constrained motion. In this desired motion is obtained by construction itself.
Hence, the correct option is (D).
&Key Points:-
Incompletely constrained motion happens when desired motion is not possible and motion between two elements of a pair is possible in more than one direction depending upon the direction of the force applied.
Example : A circular bar in a circular hole.
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