Two particles with the same electric charge have a mass of 3.6x10-6 Kg and of 6.

Question

Two particles with the same electric charge have a mass of 3.6x10-6 Kg and of 6.2x10-6 Kg, respectively. They are initially held at rest and the two-particle system has an initial electric potential energy of 0.150J. Suddenly, the particles are released and they fly apart. The effects of the gravitational force are negligible and no other forces act on them, except for their mutual repulsion. At one instant following the release, the speed of particle 1 is determined to be v1=170m/s. What is the electric potential energy of the two-particle system at this instant?

Explanation / Answer

chenge in potential energy = kinetic energy 0.15 - p = 0.5*(6.2+3.6)*10^-6*170*170 p= 0.00839 J

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