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Force acting on a block moving along x-a...

Force acting on a block moving along x-axis is given by
`F = - ((4)/(x^(2)+2))N`
The block is displaced from `x = - 2m` to `x = + 4m`, the work done will be

A

Positive

B

Negative

C

Zero

D

May be positive or negative

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The correct Answer is:
A
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