Asked by Anonymous

A charge of -5.4X10^-7 exerts an upward .250 N force on an unknown charge .260m directly below it. What is the unknown charge?
Answered by Elena
F=k•q₁•q₂/r²
k =9•10⁹ N•m²/C²
q₂ =F•r²/k •q₁
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