Mechanical Engineering Mcqs

The effort required to lift a load W on a screw jack with helix angle a and angle of friction <j) is equal to _________________?

(A)  Wtan(a + )

(B)  Wtan(a-)

(C)  Wcos(a + )

(D)  Wsin(a + )

(E)  W (sin a + cos ).

Submitted By :Ali Uppal

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