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Q.

The relationship between the force F and position x of a body is as shown in figure. Then what will be the work done in displacing the body from x = 1 m to x = 5 m ?

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a

30 J

b

15 J

c

25 J

d

20 J

answer is B.

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Detailed Solution

Work = Area enclosed by

(F - x) curve with x-xis.

W=1×10+1×51×5+12 × 1× 10

W=10+55+5=15J

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