Question

Coulomb's Law F = k12 relates the force F between two charges q and 72 Q, which are a distance of r units apart. Solve the formula for k. O k 72 F qQ O k = FqQ 72 Ok = -90 O k=p²F+qQ Ook Air

Answer 1

`\begin{gathered} F=k(qQ)/(r^2) \\ We\text{ want to make 'k' the subject of the formula:} \\ MultiplyBothSidesBy,r^2 \\ F\cdot r^2=kqQ \\ \text{Divide both sides by 'qQ', we have:} \\ k=(r^2F)/(qQ) \end{gathered}`

Hence, option A is the correct answer