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What is the magnitude of the force on a

-1.2 muC charge placed at a point 1.6 cm to the left of the

middle charge?? Answer in units of N.

This is what I did:

I used Fx = k*|Q|*(qx/r^2)

Q= 1.2*E-6

I plugged in 8.6*E-6 into the above equation (keep in mind i used 3.7cm-1.6cm =2.1 cm --> .021m) and got F1=210.320898

I plugged in 4*E-6 into the above equation (i used .016m) and got F2=168.5165625

I plugged in -1.2*E-6 into the above equation (i used .016+.032=.048m) and got F3 = -5.61721875

Then for F final = -F1 + F2 - F3 = -36.187

Since it asks for magnitude I plugged in 36.187. It came up as wrong... where did i go wrong??

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# Homework Help: Charged particles - magnitude of force

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