Question

Force between 3 point charges:

Answer 1

Force between charges is given by \[k \left( \frac{ q1q2 }{ d ^{2} } \right)\]

Answer 2

I need the force on q3 due to the other 2 charges. I apparently suck at vector addition and I cant figure this out.

Answer 3

q1-q3 = \[\sqrt{41}\]

Answer 4

q3->q2 =\[\sqrt{34}\]

Answer 5

pooja help me out here! :)

Answer 6

are q1 q2 and q3 all positive?

Answer 7

It shouldn't matter for a general force equation, the signs get added later.

Answer 8

well did they provide you with that information?

Answer 9

because it effects the direction of the Force vector

Answer 10

No, I have no charges. All I have is the distances.

Answer 11

The force vectors equation would be the same right? Just the sign would determine its direction? So a general solution would have a +- out front?

Answer 12

I mean you can assume either if you can help me find the vector, I dont know how to split components and add vectors anymore because I suck at math.

Answer 13

The magnitude of the force between q1 and q3 is \[\sqrt{41}\] correct?

Answer 14

And the magnitude between q2 and q3 is \[\sqrt{34}\]

Answer 15

Now I need directions, I can find the angles sure, but then how do I combine the 2 vectors?

Answer 16

oh ok, I did a problem like that yesterday. I'm taking physics II as well


Here I'm assuming that \[+q_1 \:\textrm{and} +q_2 \; \textrm{and} \; +q_3\]

Answer 17

I didn't split them up into components yet, but do you see what I did?

Answer 18

Yup I got you so far.

Answer 19

ok good!
but I hope that q_1 and q_2 and q_3 are positive, because otherwise they'll point the opposite direction.....anyhow....let's continue