## anonymous 4 years ago A charge of 1.82E-9 C is placed at the origin, and a charge of 4.32E-9 C is placed at x = 1.26 m. Find the position at which a third charge of 3.05E-9 C can be placed so that the net electrostatic force on it is zero. I am assuming that the charges are in a straight line. There was not an illustration with it.

1. anonymous

yes charges are in a straight line & the third charge placed between to charges & near the smaller charge ,do you understand?

2. TuringTest

assuming all charges are positive|dw:1327621953156:dw|$\sum F=k\frac{q_1q_2}{r_{12}^2}-k\frac{q_2q_3}{r_{23}^2}=0$solve for r23

3. TuringTest

...assuming you want to equalize the force on q2 that is

4. anonymous

really all charges are positive TURING

5. TuringTest

does it say so in the problem?

6. TuringTest

well they could all be negative too I guess, it wouldn't change anything as long as they have the same sign

7. anonymous

yes you are right