PS$16$

$11$

Vectors, Forces, Fields

Question $8$: More than one source. Two raindrops each have charge $q$ and are located on the $x-$axis at $x=$a and $x=-a.$ Find the force on a third drop with charge $Q$ that is located on the $y-$axis at $y=b.$ All $3$ charges are positive. $($Note: Your answer should be an algebra expression with the given variables and constant $k.)$