The charge at the coordinate origin has a value of q1 = +9.00 ÁC; the other two have identical magnitudes, but opposite signs: q2 = -5.50 ÁC and q3 = +5.50 ÁC.
(a) Determine the net force (magnitude and direction) exerted on q1 by the other two charges. magnitude in N
direction ░ (measured counter clockwise from the x-axis)
(b) If q1 had a mass of 1.00 g and it were free to move, what would be its acceleration?
please help me with this, i know there associated with Columbs law.