The only force acting on a block is along \( \mathrm{P} \) \( \math...

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The only force acting on a block is along
\( \mathrm{P} \) \( \mathrm{x} \)-axis is given by \( \mathrm{F}=-\left(\frac{4}{x^{2}+2}\right) N \). When the

W
block moves from \( x=-2 m \) to \( x=4 m \), the change
in kinetic energy of block is -
(1) Positive
(2) Negative
(3) Zero
(4) May be positive or negative
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