physics

A positive charge of q = 2.6 µC is pulled on by two negative charges. As shown below, one, −2.0 µC, is 0.050 m to the north and the other, −4.0 µC, is d = 0.029 m to the south. What total force is exerted on the positive charge?

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  1. The two negative charges pull the positive charge in opposite directions. Use Coulomb's law

    F = k q1 q2 /r^2

    to compute the two separate forces. The force pulling to the south will be stronger because the -4.0 uC charge is larger and closer. Subtract the force due to the other charge to get the total force, which will be the south.

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