A circular bar sliding inside a round hole represents what type of kinematic pair_______________?
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Answer: A. incompletely constrained motion
Explanation
A circular bar inside a hole can both slide axially and rotate freely about its axis. More than one independent degree of freedom exists for the relative motion between the parts. Because the motion is not restricted to a single path, it is classified as incompletely constrained. Kinematic pairs are classified based on the nature of relative motion permitted between elements. Completely constrained motion occurs when elements move along a single predetermined geometric path. Degrees of freedom define the number of independent parameters needed to specify motion.
Machine design requires careful constraint analysis to ensure predictable mechanical component operation. Unwanted degrees of freedom can cause vibration, misalignment, and premature mechanical wear. Bearings and shafts are engineered to restrict specific motions while permitting required rotations. Completely constrained motion allows only one specific type of relative movement between parts. Successfully constrained motion refers to setups where constraints rely on external loads or forces. Partially constrained is not the standard formal terminology used in kinematic pair classifications.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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