Two particles, with charges of 20.0 nC and -20.0 nC, are placed at points with c

Question

Two particles, with charges of 20.0 nC and -20.0 nC, are placed at points with coordinates <0,

4.00 cm> and <0, -4.00 cm> as shown in the figure. A particle with charge 10.0 nC is located

at the origin. (a) Find the electric potential energy of the configuration of the three fixed charges. (b) A fourth particle, with a mass of 2.00 x 10-13 kg and charge of 40.0 nC, is released from

rest at the point <3.00 cm, 0>. Find its speed after it has moved freely to a very large distance

away.

Explanation / Answer

P.E-= kq1q2/r = -9*10^9 * 400*10^-18/ 8*10^-2= -4.5*10^-5 v= 2*(k*10*10^-9* 40*10^-8/3*10-2)/m=3.464*10^4 m/s

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