ok, im trying to do this "prelab" thing for my lab tomorrow, and there is one question i just can NOT figure out. the question is(adsbygoogle = window.adsbygoogle || []).push({});

The weight of a 0.6 kg object of charge Q is just balanced by another object of equal but opposite charge fixed to a support 107 cm above it. What is the magnitude of the charge Q (in μC)? [Note that 1 μC=1x10-6C.]

i understand how coulomb's law works, with F=k(q0q1)/r^2 but what i am having trouble figuring out, is what can i do to get an answer here? i have the mass, and the distance (r). i was thinking to use the force of gravity formula, and set it equal to coulomb's, but i looked at an example in the book where they are given q0 and q1, and they found both gravity and coulombs, and the answers were not equal. so i figured that must mean that is not the right way to do it.....

any ideas? sorry so long, its been bugging me for a while now... any help is appreciated

thanks in advance

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# Homework Help: I think this is coulomb's law

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