Calculating Net Force from Charges

[Gardalay]

If I have two different charges and I'm told to calculate net force, do I just use F=KQ1Q2/r^2 or Fnet=F1+F2...
Please explain.

 

[rock.freak667]

If I have two different charges and I'm told to calculate net force, do I just use F=KQ1Q2/r^2 or Fnet=F1+F2...
Please explain.

If you have two charges at a distance 'r' then it is just F=KQ₁Q₂/r²


If you have more than two charges, you'd need to find the force between each pair of charges and then find the resultant force using F_net=F₁+F₂

 

[Gardalay]

Ahh ok thanks