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A force F acting on the object varies wi...

A force F acting on the object varies with distance x as shown in fig.The force is in N and x is in m.The work done by the force in moving the object from x =0 to x=6 m is :
.

A

`18.0 J

B

13.5 J

C

`9.0 J`

D

4.5 J.

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