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A charge of -4.39 C is fixed in place. From a horizontal distance of 0.0132 m, a particle of mass 9.78 x 10-3 kg and charge -8.74 C is fired with an initial speed of 90.4 m/s directly toward the fixed charge. How far does the particle travel before its speed is zero?

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The expert examines a charged particle fired at fixed charges.

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A charge of -4.39 10^(-6) C is fixed in place. From a horizontal distance of 0.0132 m, a particle of mass 9.78 x 10^(-3) kg and charge -8.74 10^(-6) C is fired with an initial speed of 90.4 m/s directly toward the fixed charge. How far does the particle travel before its speed is zero?

This problem is most easily solved using conservation of energy. The potential energy of a system of two charges is:

W = q_1 q_2/(4 pi epsilon_0 r)

Here q_1 and q_2 are the charges and r is the relative distance between the two charges. From ...

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