Question

Work will be positive if the angle b/w force and displacement is,
(A) 90 degree
(B) 120 degree
(C) 180°
(D) 60°​

Answer 1

Acc. To me,

Your answer is D

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Formula of W=F*S*cos∅

W is -ve or +ve depend on cos∅(Angle b/w force and dislacement)

cos 90=0 ---W=0

cos120= -1/2-----w= -ve

cos180= -1------w= -ve

cos60=1/2 ----w = +ve

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I hope you understand my answer