(a) Find the electric potential at point P in Figure 20-25. (b) Suppose the three charges...

(a) Find the electric potential at point P in Figure 20-25. (b) Suppose the three charges shown in Figure 20-25 are held in place. A fourth charge, with a charge of +6.11 μC and a mass of 4.71 g, is released from rest at point P. What is the speed of the fourth charge when it has moved infinitely far away from the other three charges?

FIGURE 20-25 Problem