A particle (charge 7.5 μC) is released from rest at a point on the x axis, x = 10 cm. It begins to move due to the presence of a 2.0-μC charge which remains fixed at the origin. What is the kinetic energy of the particle at the instant it passes the point x = 1.0 m?
A) 3.0 J
B) 1.8 J
C) 2.4 J
D) 1.2 J
E) 1.4 J

Question

Quizplus · Accepted Answer

The potential energy difference between the initial and final positions is converted into kinetic energy. Using the formula for electric potential energy, U = k * q1 * q2 / r, calculate the initial and final potential energies and find the difference. This difference is the kinetic energy gained.

A Particle (Charge 7