(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

What is the force F_vec on the 1 nC charge?

Give answer as magnitude in Newtons.

2. Relevant equations

F = K qq/r^2

K = 1/4(pi)epsilon_knot; = 8991804694 N m^2/C

3. The attempt at a solution

A. Convert it all. cm to m. nC to C.

B. Vectors for Forces. The two x-component forces from the two 2 nC charges are equal and opposite (both repelling the 1 nC charge) so they cancel.

So F(x_net) = 0 Newtons

C. Similarly the y-component forces are the equal and in the same direction. So I merely found one and doubled it.

To obtain y, I used the ole: y = sqroot[ (.01m)^2 - (.01m/2)^2) = .00866m

F = Fnet_y = 2F_y = [2 * (8.99 Nm^2/C^) * (2E-9 C)(1E-9 C)] / (.00866m)^2

F = 4.80 * 10^-4 N

where did i go wrong? thanks

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# Homework Help: Forces between 3 charged particles

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