It is given: The mass of the electron [TIE = 9.1131031 kg, the charge EI-f the EIEEtFn E = LEXID'H C and 1 = gnaw -m3f'2.

Electron is left from rest on the axis of a uniformly and positively charged ring of negligible thickness, at a distance d = 10 cm from the center of O. Considering that the linear load density of the ring is λ = 0.1 μC/m and the radius of the ring is R = 20cm, calculate the speed at which the electron moves when it reaches the center O of the ring.