Part A

Two small plastic spheres each have a mass of $1\mathrm{.}4g$

and a charge of $-56\mathrm{.}0nC.$ They are placed $2\mathrm{.}4cm$

apart $($center to center$).$

What is the magnitude of the electric force on each sphere?

Express your answer with the appropriate units.

$F=$

Part B

By what factor is the electric force on a sphere larger than its weight?

$\{$:$\frac{F}{mg}=|,]$