A force F = -K(yi+xj) (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 x-axis to the point (a, 0) and then parallel to the y-axis to the point (a, a). The total work done by the force F on the particles is
(a) -2 Ka2 (b) 2 Ka2
(c) – Ka2 (d) Ka2
Answer: C
(66)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)