Hii...in the pic..for the force F12 why are we taking r21..??
(r12 shdnt come?)
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because in this diagram force is working in the opposite direction..here it applies from q2 to q1..so r 21 comes..for more you can see Coulomb's law in vector form
Anonymous:
but why cant r12 come..if the force is F12
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Here force is acting in another direction
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