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This worked with Caitlyn, maybe this will work...

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Okeas

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HELP
Three positive point charges of q1 = 4.8 nC, q2 = 6.4 nC, and q3 = 2.4 nC, respectively, are arranged in a triangular pattern, as shown below. Find the magnitude and direction of the electric force acting on the 6.4 nC charge.
magnitude= _____ N
Ndirection= _____ ° clockwise from the +x axis.
1549043622144.png
Would appreciate an explanation on this too, I have a test on Monday and I don't know what I'm doing. This is physics any smart ppl out there?
 
The magnitude of the electric force is 1.533*10^-7
and the direction is 18.4 degrees counter clockways to the x-axis.
 
but...
You need to know the angle formed at charge 2 (theta) and the distances r1-2 and r3-2.

The force of 1 on 2 is:
F12 = k q1 q2 / r12^2

The force of 3 on 2 is:
F32 = k q3 q2 / r23^2

You need to add these two forces using the law of cosines, so you need the angle between them, theta.

Ftotal = sqrt (F12^2 + F32^2 + 2 F12 F32 cos theta)

I assume you can get the angle and needed distances from your drawing.

A more in depth tutorial: https://study.com/academy/lesson/magnitude-direction-of-the-electric-force-on-a-point-charge.html

If you are more an equation type of guy
electric_field_formula_4.png

OR

electric_field_formula_5.png
 
Another pro tip, if it is an AP class, most worksheets are recycles by the year, if you get the publisher off the bottom of the page, and put the worksheet name in, almost EVERY SINGLE worksheet for AP physics 1-2 is online
 
Myth said:
Another pro tip, if it is an AP class, most worksheets are recycles by the year, if you get the publisher off the bottom of the page, and put the worksheet name in, almost EVERY SINGLE worksheet for AP physics 1-2 is online
Click to expand...
Mad lad
 
Myth said:
but...
You need to know the angle formed at charge 2 (theta) and the distances r1-2 and r3-2.

The force of 1 on 2 is:
F12 = k q1 q2 / r12^2

The force of 3 on 2 is:
F32 = k q3 q2 / r23^2

You need to add these two forces using the law of cosines, so you need the angle between them, theta.

Ftotal = sqrt (F12^2 + F32^2 + 2 F12 F32 cos theta)

I assume you can get the angle and needed distances from your drawing.

A more in depth tutorial: https://study.com/academy/lesson/magnitude-direction-of-the-electric-force-on-a-point-charge.html

If you are more an equation type of guy
electric_field_formula_4.png

OR

electric_field_formula_5.png
Click to expand...
Did you google that or do you know exactly what your doing because that is the same exact process I went through
 
Myth said:
Another pro tip, if it is an AP class, most worksheets are recycles by the year, if you get the publisher off the bottom of the page, and put the worksheet name in, almost EVERY SINGLE worksheet for AP physics 1-2 is online
Click to expand...
It’s not AP just basic physics
 
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