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Byju's Answer

Standard XII

Physics

Law of Conservation of Mechanical Energy

When acted up...

Question

When acted upon by a force $F$ , a body suffers a displacement $S$ . The work done will be positive if the angle between $F$ and $S$ be

an acute angle

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an obtuse angle

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always equal to

0^{0}

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equal to

180^{0}

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Solution

The correct option is A an acute angle
If $θ$ be the angle between force $F$ and displacement $S$ , work done, $W = F . S . c o s θ$
So, work done to be positive, $c o s θ$ should be positive.
And, $c o s θ$ is positive when $θ$ is an acute angle.

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When acted upon by a force F, a body suffers a displacement S. The work done will be positive if the angle between F and S be

The correct option is A an acute angleIf θ be the angle between force F and displacement S, work done, W=F.S.cosθSo, work done to be positive, cosθ should be positive.And, cosθ is positive when θ is an acute angle.

When acted upon by a force $F$ , a body suffers a displacement $S$ . The work done will be positive if the angle between $F$ and $S$ be

The correct option is A an acute angle
If $θ$ be the angle between force $F$ and displacement $S$ , work done, $W = F . S . c o s θ$
So, work done to be positive, $c o s θ$ should be positive.
And, $c o s θ$ is positive when $θ$ is an acute angle.