Three charges are positioned on a line. Q1= -2uC, Q2= +5uC, Q3= +3uC. The distance between Q1 and Q2 is a=0.25m. The distance between Q2 and Q3 is b=0.5m.
a) find the magnitude of the electric force acting on the charge Q2.
b) Find the direction of the electric force acting on the charge Q2.