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A force F=−kx2(x≠0,(k) is a positive constant), acts on a particle in x direction. The work done by this force in displacing the particle from x=+a to x=+2a is

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A force F=kx2(x0,(k) is a positive constant), acts on a particle in x direction. The work done by this force in displacing the particle from x=+a to x=+2a is



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