Two identical charged spheres suspended from a common point by two mass-less strings of length `l` are initially at a distance d ( `d ltlt l`) apart because of their mutual repulsion . The charge begins to leak from both the spheres at a constant rate. As a result the charge approach each other with a velocity `v`. Then as a function of distance `x` between them .

Two identical charged spheres suspended from a common point by two massless strings of length l are initially a distance d ( d ltlt l) apart because of their mutual repulsion . The charge begins to leak from both the spheres at a constant rate As a result the charge approach each other with a velocity v . Then as a function of distance x between them .

Two identical charged spheres suspended from a common point by two massless strings of lengths I, are initially at a distance d(d ltlt l) apart because of their mutual repulsion. The charges begin to leak from both the spheres at a constant rate. As a result, the spheres approach each other with a velocity v. Then v varies as a function of the distance x between as: