- #1
Gabriel Maia
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The sistem above is the one I'm interested in. There is two equally charged spheres spinning on a plane. The line has L=[itex]\sqrt{2}[/itex] m and the spheres weight 0.6Kg. The angular speed is [itex]\omega[/itex] = 2rad/[itex]s[/itex].
The radius for the circular trajectory is R=1m and so the centripetal force is [itex]F_{c}=m\omega^{2}R=2.4N[/itex].
I must find the charges q so
[itex]2.4=k\frac{q^{2}}{(2R)^{2}}[/itex], right? Where [itex]k=9*10^{9}N m^{2} C^{-2}[/itex].
I found q=32.7[itex]\mu C[/itex] but the problem is said to have an answer 40[itex]\mu C[/itex].
Where have I commited a mistake if any?
Thank you.
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