If a = 3.0 mm, b = 4.0 mm, Q1 = 60 nC, Q2 = 80 nC, and q = 24 nC in the figure, what is the magnitude of the total electric force on q?
A. 2.7 N B. 1.9 N C. 2.3 N D. 1.5 N E. 0.52 N
Q1( )
|
| a
|
| b
Q2( )---------------( ) q

the angle in between is 90 degree...please help me with this
i understand this has something to do with the Ke*q1*12/ r
but i have no idea how to do it...please help me~~