A particle of charge on the y-axis a distance ( ) from the origin and a second particle of charge is on the x-axis adistance ( ) from the origin. The magnitude of the x-component of the force on the second particle is:

The question is incomplete, we can notice that from from () in between the question.

The correct question is:

A particle of charge on the y-axis a distance a from the origin and a second particle of charge is on the x-axis a distance d from the origin. The magnitude of the x-component of the force on the second particle is:

d=

Explanation:

given

distance from origin on y axis = a

distance from origin on x axis = d

attached is an equation that further explains how we got the answer

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this