The resultant force, r, is related to two concurrent forces, x and y, acting at right angles to one another, by the formula r^2=x^2+y^2 . rewrite the formula for y.

To find the formula for y in the equation:

First thing we do is we must isolate the y variable

To simplify our answer is we will square root both of the sides of the equation,

and this will be the formula for the resultant force for y.