1.

A force →F=−k(y^i+x^j) (where k is a positive constant) acts on a particle moving in the x−y plane. Starting from the origin, the particle is taken along the positive x−axis to the point (a,0) and then parallel to the y−axis to point (a,a). Then, total work done by the force is

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A force F=k(y^i+x^j) (where k is a positive constant) acts on a particle moving in the xy plane. Starting from the origin, the particle is taken along the positive xaxis to the point (a,0) and then parallel to the yaxis to point (a,a). Then, total work done by the force is



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