Vo F E x = Vy = VO Vf = A series of widely spaced charged particles characterized by q = 1.6 x 10-19 C with mass mp 1.6 x 10-27 kg travel with an initial velocity vo 2.0 ms 1. In the absence of an electrical field the particles follow the dashed line trajectory, with the vy component due to the effects of gravity. A uniform electrical field is imposed which results in the solid line trajectory with no vy component. What must the field strength of the external E field be?