2. calculate change in. mechanical energy(P.E+K.E).

U will hav to use d fact dat centripetal force = coulomb force.

1. dC = e SK1(1+sin piex/d) / dx

1/C = integral of 1/dC

1/C = 1/eSK1  integral of dx/(1+sin piex/d)

now calculate urself. limit would be ofcourse 0 to d.!