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4. Consider the diagram. Find the position x of the mass m such that the system is horizontal
and balanced. Also for what value of h would there exist no force of the pivot on the rod? The
fulcrum is at the midpoint of the rod. There is only a force of gravity on the hanging mass, not
on the rod or the charges. Ignore the two coulomb forces that are diagonal.
X=?
+2g
tQ
+Q

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