What should the angle between force and displacement be to get the minimum work?

90⁰

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0⁰

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180⁰

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270⁰

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Solution

The correct option is A
90⁰

If displacement is normal to the direction of force, then θ = 90°, and then W = F .s.cos 90° = F .s. 0 = 0

In such a case work done is said to be minimum.

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What should be the angle between force and displacement be to get the

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A force F acts on a body and displaces it by a distance S in a direction at an angle $θ$ with the direction of force.

(a) Write the expression for the work done by the force.

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