Question : A force F= βKπΎ(π¦iΜ+ π₯j)Μ (where πΎ is a positive constant) acts on a particle moving in the π₯β Y plane. Starting from the origin, the particle is taken along the positive π₯-axis to the point (a, 0) and then parallel to the π¦-axis to the (π,a). The total work done by the force Fβ on the particle is
(A) -2ka^{2}
(B) 2ka^{2}
(C) -ka^{2}
(D) ka^{2}
Answer : option (D)
Solution :
