- #1

Bagwan

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The unit right now is electrostatics, but this question is really just vectors, nothing to do with charges or anything... anyways here is the info:

Three identical point charges, A, B, and C are located as shown here:

The force A-on-C is the same as the force B-on-C.

I think the only equation I need is the superposition of force principle:

F

[/B]

Breaking into components (not allowed to use cosine law for some reason):

I know X-axis force is 0 as the 2 forces cancel out (since they are both equal and in opposite directions).

F

Not sure what else I can do though...

EDIT: I messed around with the 1-1-sqrt(2) triangle and I'm not sure if this is right, but is (2/sqrt(2)) * F

EDIT 2: Yes, that's the right answer, but sqrt(2) * F

Because guess what, 2 divided by squareroot(2) is THE SAME THING AS squareroot(2)...

1. Homework Statement1. Homework Statement

Three identical point charges, A, B, and C are located as shown here:

The force A-on-C is the same as the force B-on-C.

*What is the net force on C?*## Homework Equations

I think the only equation I need is the superposition of force principle:

F

_{netC}= F_{AonC}+ F_{BonC}## The Attempt at a Solution

[/B]

Breaking into components (not allowed to use cosine law for some reason):

I know X-axis force is 0 as the 2 forces cancel out (since they are both equal and in opposite directions).

F

_{netCY}= F_{AonC}* cos(45) + F_{BonC}* cos(45)Not sure what else I can do though...

EDIT: I messed around with the 1-1-sqrt(2) triangle and I'm not sure if this is right, but is (2/sqrt(2)) * F

_{AonC}the right answer?EDIT 2: Yes, that's the right answer, but sqrt(2) * F

_{AonC}is also right.Because guess what, 2 divided by squareroot(2) is THE SAME THING AS squareroot(2)...

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