4. A positive charge 1 (+3.0 x 10-4 C) with a mass of 2.00 kg is released from rest at a height of 20.0 m directly above another identical charge 2 at rest (permanently) on an insulated horizontal surface at ground level. Find the maximum speed of falling charge I if it can only move vertically. Assume the two charges do not make contact. O Charge 1 20.0 m Charge 2 k - 8.99 x 10" Nm /C?, my - 9.11 x 10-31kg. e - 1.6 x 10-19 C. mp - 1.67 x 10-27kg