If two people are pulling a box in the same direction with 85 N and 65 N force and the net displacement of the box is 18 m, then the net work done is _____.

2700 J

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2800 J

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1900 J

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1250 J

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Solution

The correct option is A
2700 J

Let
Force applied by first person be, $F_{1} = 85 N$
Force applied by second person be, $F_{2} = 65 N$ .
Given:
Displacement, $s = 18 m$
Since, both the forces are acting in the same direction, net force $= 85 + 65 = 150 N$
$∴$ Net work done W is given by
W $=$ Net force $\times$ displacement
W $= 150 \times 18 = 2700 J$
The net work done is $2700 J$ .

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