CGPET 2016 Solved Paper

The work done on the particle of mass M by a force, is given as
k[

x

(x2+y2) 3 2

∧

i

+‌

y

(x2+y2) 3 2

‌

∧

j

]
( k being constant of appropriate dimensions). When the particle is taken from the point (a,0) to the point (0,a) along a circular path of radius a about the origin in the xy-plane is