Question

I am currently stuck on a Coulombs Law problem in physics 2. Any advise would be of great help. The problem is posted in the image below.

Answer 1

@c_c_mill

Answer 2

Is the arrangement clear?

Answer 3

Yes but it does not fit the one that is described in the problem.

Answer 4

Q1 is at (0,3)
Q2 at (0,-3) and
Q3 at (4,0)

Answer 5

So, where is the problem?

Answer 6

oh yes!

Answer 7

ok?

Answer 8

Okay yes I had something similar to this drawn. I calculated the force using a distance of five for both. I then used sin and cos to find my components and added them. I got the wrong answer. Could have been a mathematical error but I couldn't find it.

Answer 9

I also tried changing the sign on the answer just to see and was still incorrect.

Answer 10

Ok, let's see how to do it...

#1

\(\sf Q_1\)=68
\(\sf Q_2=68 \\ Q_3=23\)

Force for each of them will be equal to \(\sf \huge \frac{K\times 68 \times 23}{5^2}\)

Answer 11

Correct?

Answer 12

Yes

Answer 13

However I believe you must convert to standard units first.

Answer 14

Now we need to find the cos component and for that we need to find the value of \(\sf Cos \theta\)