In a screw jack, the effort required to lower the load W is given by

M

Mr. Dubey • 52.30K Points
Coach

Q. In a screw jack, the effort required to lower the load W is given by

(A)

P = W tan (α - φ)

${\text{P}} = {\text{W}}\tan \left( {\alpha - \varphi } \right)$

(B)

P = W tan (α + φ)

${\text{P}} = {\text{W}}\tan \left( {\alpha + \varphi } \right)$

(C)

P = W tan (φ - α)

${\text{P}} = {\text{W}}\tan \left( {\varphi - \alpha } \right)$

(D)

P = W cos (α + φ)

${\text{P}} = {\text{W}}\cos \left( {\alpha + \varphi } \right)$

Correct : Option (C)

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