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Forces F 1 an...

Question

Forces $F_{1}$ and $F_{2}$ are acting on a body in opposite directions. The body displaces by 's' metres in the direction of force $F_{2}$ . What is the total work done on the body?

100 J

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200 J

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400 J

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50 J

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Solution

The correct option is C
400 J

Given: Since the body displaces in the direction of force $F_{1}$ , force $F_{1}$ is greater than force $F_{2}$ and displacement 's' is in the direction of force $F_{2}$ (given).

Work done = Force $\times$ Displacement

$\Rightarrow$ Total work done = ( $F_{1} - F_{2}$ ) $\times s$

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