Two charges Q1 = 2 μC and Q2 = 5 μC are placed at coordinates (0, 0) and (0, 25) cm respectively.
(a) Calculate the electric potentials VA and VB they produce at points A (35, 0) cm and B (75, 0) cm.
(b) Calculate the work done by their electric field on a charge q = 1.8 μC as the latter moves between points A and B.
(c) If charge q has a mass of 3.2mg and starts from rest at point A, calculate its speed at point B.