Engineering Mechanics - Mechanical Engineering Questions and Answers

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In a screw jack, the effort required to lift the load is given by(where W = Load lifted, Î± = Helix angle, and Ï† = Angle of friction.)

P = W tan (α - φ)

P = W tan (α + φ)

P = W tan (φ - α)

P = W cos (α + φ)

Answer : Option B

Explanation :

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