The expression for the work done by the force is

F S

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F S c o s θ

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F S s i n θ

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F S s e c θ

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Solution

The correct option is D $F S c o s θ$
Work = Force $\times$ displacement in the direction of force
Now, the body displaces by a distance $S$ making an angle $θ$ with the direction of force.
So, displacement in the direction of force = $S c o s θ$
So, Work = $F S c o s θ$

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