Theory of Machine - Mechanical Engineering Questions and Answers

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In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = 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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