The maximum efficiency of a scres jack having square threads and friction angle of 30 degree will be

A

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📊 Applied Mechanics

Q. The maximum efficiency of a scres jack having square threads and friction angle of 30 degree will be

(A) in a lift moving up with an acceleration
(B) in all the above cases
(C) 107 dynes
(D) on the surface of moon

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✅ Correct Answer: (D) on the surface of moon

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