- #1

- 188

- 0

## Homework Statement

Calculate the magnitude and direction of the Coulomb force on each of the three charges shown in Figure P15.10.

http://www.webassign.net/sf5/p15_10.gif

thats 3 cm if its to small to see.

6.00 µC charge

Magnitude

1.50 µC charge

Magnitude

-2.00 µC charge

Magnitude

## Homework Equations

**F = K|q1||q2|/r^2**

## The Attempt at a Solution

I tried this problem and it said i was incorrect but within 10% to the answer and that my rounding is off or something.

this is what i did:

**(converted to m and C)**

8.9875 x 10^9 (6 x 10^-6)(2 x 10^-6)/.05^2

8.9875 x 10^9 (6 x 10^-6)(2 x 10^-6)/.05^2

**.10785/.05^2**

=

**43.14 N**

That looks correct but it is saying I am off. It say that I am within 10% to the answer. Can anyone look at this and tell me what I am doing incorrectly?

For the other 2 I am not sure what to do, but i gave it a try

for 1.5uC i did

**K(1.5 x 10^-6)(2 x 10^-6)/.02^2**this completely got me the wrong answer and not sure where to start on this.