two forces are in effect
Fnet=kq1q2/.1^2 + kq1q3/.15^2
the first is directed perpendicular to x axis. The other, has a component perpendicular to the x axis of kq1q3/d^2*cosTheta where d is sqrt(.1^2+.15^2) and cosTheta=.1/(d)
total force on x axis: kq1q2/.1^2 + kq1q3/(d^2) * .1/d
Three charges q1= 2uc(0,0)cm q2=4uc(0,10)cm and q3=_3uc(15,0)cm acts on one another, find the magnitude of the total electric force and the angle that the total electric force makes with positive x_axis.
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