The Scott-Russell mechanism is composed of_________________?
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Answer: A. sliding and turning pairs
Explanation
The Scott-Russell mechanism utilizes both sliding pairs and turning pairs to function. This combination allows the linkage to convert rotary motion into exact linear motion. Sliding blocks move along straight guides while connected arms rotate on fixed pins. John Scott-Russell invented this straight-line mechanism in the nineteenth century. It requires fewer links than some alternative exact straight-line generators. The geometry relies on the geometric properties of right triangles inscribed in circles.
Steam engine valve mechanisms historically employed Scott-Russell linkages for linear guidance. Suspension designs in some vehicles incorporate similar sliding and turning combinations. Kinematic analysis of mixed pairs helps engineers design compact linear actuators. Option B uses the term rotary which is less precise than turning pairs in kinematics. Option C omits sliding pairs entirely, making straight-line generation impossible. Option D ignores the turning pairs required to connect the moving arms together.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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