Calculating Net Force from Charges

Gardalay · Jun 3, 2010

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 · Jun 3, 2010

Gardalay said:

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 · Jun 4, 2010

Ahh ok thanks

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