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Upward Impending Motion

Upward Impending Motion

A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. Its operation is based on converting the force applied at its handle into a torsional moment, causing the upward impending motion of the screw. This movement is accomplished by overcoming the static friction between the threads of the screw and the jack.
To better comprehend how a screw jack functions, consider the completely unraveled thread as a block in contact with the...

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Related Experiment Video

Updated: Jun 13, 2026

A Tactile Automated Passive-Finger Stimulator (TAPS)

A Tactile Automated Passive-Finger Stimulator (TAPS)

Published on: June 3, 2009

Dr Jack Tinker: 1936-2010

Rebecca Linssen¹, Mark Allen

¹Mark Allen Group, St Jude's Church, London, UK.

British Journal of Hospital Medicine (London, England : 2005)

|May 8, 2010

Summary

No abstract available in PubMed .

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