Magnitude and direction of the net force on charge -3Q and charge 4Q

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SUMMARY

The forum discussion focuses on calculating the net force on charges -3Q and 4Q positioned at the corners of a square. The relevant equation used is Coulomb's Law, F = K(q1)(q2)/r^2, with K being 8.99 x 10^9 N m²/C². Participants emphasize the importance of drawing vector representations of the forces exerted by the other charges and combining these vectors to determine the resultant force on -3Q and 4Q.

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balletgirl
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Homework Statement



Four charges are located at the corners of a square as shown below. Calculate the magnitude and direction of the net force on charge -3Q and charge 4Q.

(sorry don't have picture, but it is of a square with corners -Q, 2Q, -3Q, and 4Q clockwise).


Homework Equations



F= K(q1)(q2)/r^2

K= 8.99x10^9

The Attempt at a Solution



I don't understand how to start with the information I've been given, it seems like its not enough.
 
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Hi balletgirl! :wink:

Start with the charge of -3Q.

Draw the three vectors through it representing the forces from the other three charges.

Then add those three vectors by adding their components …

what do you get? :smile:​
 

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