Posted by **sarah** on Wednesday, January 29, 2014 at 11:26pm.

Four charges −8 × 10^−9 C at (0 m, 0 m),

−7 × 10^−9 C at (5 m, 1 m), −1 × 10^−9 C

at (−2 m, −3 m), and 2 × 10^−9 C at

(−2 m, 4 m), are arranged in the (x, y) plane as shown.

Find the magnitude of the resulting force on the -8c charge at the origin. The Coulomb constant is 8.98755 x 10^9.

Please help!

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