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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