A particle of charge 55 microc is released from rest at, Ask an Expert

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A particle of charge = +5.5 µC is released from rest at the point x = 55 cm on an x axis. The particle begins to move due to the presence of a charge Q that remains fixed at the origin.

(a) What is the kinetic energy of the particle at the instant it has moved 40 cm if Q = +15 µC?

______J

(b) What if Q = -15 µC?

______J

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