When the angle between force & displacement is less than 90 work done is positive because one component of force will be positive Fd cos theta i.e.Fdcos0=Fd×1=Fd & the other Fdsin theta is zero, but why it’s zero as sin90=1?

Answers (1)
S safeer

The displacement of the body is in the direction of Fcos theta. There is no displacement in the perpendicular direction. Therefore no work in perpendicular direction

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