Four charges are arranged in (x,y) plane:(adsbygoogle = window.adsbygoogle || []).push({});

-3nC at (-4, 1)

-4nC at (0, 0)

-6nC at (5, 3)

-7nC at (4, 5)

Find the magnitude of the resulting force charge at the origin(0, 0).

I know how to find radius:

R1(squared) = 17

R2(squared) = 0

R3(squared) = 34

R4(squared) = 41

But I don't know which charges to use in the equation to find four different forces:

F=(K*q1*q2)/r(sqared)

K = 8.99 * 10^9

Can someone please help me?

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# Homework Help: Charges problem.

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