Physics · Machine Elements
A square-threaded screw is used to lift a load W by applying an effort force F. How is the efficiency of a square-threaded screw expressed?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The direct numerical ratio of F/W
- 2The direct numerical ratio of W/F
- 3The ratio of work done by the effort force F per revolution to the work done on the load W per revolution
- 4The ratio of work done on the load W per revolution to the work done by the effort force F per revolution✓
Correct answer
The ratio of work done on the load W per revolution to the work done by the effort force F per revolution
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