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Introductory Physics Homework Help
Relatively simple vectors question, but no numbers....
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[QUOTE="Bagwan, post: 5481587, member: 535489"] 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: [B] 1. Homework Statement [/B] Three identical point charges, A, B, and C are located as shown here: [ATTACH=full]188001[/ATTACH] The force A-on-C is the same as the force B-on-C. [I]What is the net force on C?[/I] [h2]Homework Equations[/h2] I think the only equation I need is the superposition of force principle: F[SUB]netC[/SUB] = F[SUB]AonC[/SUB] + F[SUB]BonC[/SUB] [h2]The Attempt at a Solution[/h2] [/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[SUB]netCY[/SUB] = F[SUB]AonC[/SUB] * cos(45) + F[SUB]BonC[/SUB] * 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[SUB]AonC[/SUB] the right answer? EDIT 2: Yes, that's the right answer, but sqrt(2) * F[SUB]AonC[/SUB] is also right. Because guess what, 2 divided by squareroot(2) is THE SAME THING AS squareroot(2)... [/QUOTE]
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Introductory Physics Homework Help
Relatively simple vectors question, but no numbers....
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