Electric Potential Energy Video Lessons

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Problem: Two particles, with charges of q1 = 50.0 nC and q2 = -50.0 nC, are placed at the points with coordinates (0, 12.00 cm) and (0, -12.00 cm) as shown in the figure below. A particle with charge q3 = 25.00 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 2.01x10-13 kg and a charge of q4 = 100.0 nC, is released from rest at the point (9.00 cm, 0). Find its speed after it has moved freely to a very large distance away.

FREE Expert Solution

The electric potential energy is given by:

U=kq1q2r12

We get the speed of the particle from the conversation of energy:

K=U12mv2=kq3q4r34

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Problem Details


Two particles, with charges of q1 = 50.0 nC and q2 = -50.0 nC, are placed at the points with coordinates (0, 12.00 cm) and (0, -12.00 cm) as shown in the figure below. A particle with charge q3 = 25.00 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 2.01x10-13 kg and a charge of q4 = 100.0 nC, is released from rest at the point (9.00 cm, 0). Find its speed after it has moved freely to a very large distance away.

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