Four point charges are fixed on the x-axis as follows:
x1=0 : q1=−2μCx2=0.15m : q2=+3μCx3=0.45m : q3=−4μCx4=0.75m : q4=+5μC
Calculate the magnitude and direction of the net electrostatic force acting on q1.
a) 2.2N toward −x
b) 2.9N toward +x
c) 2.2N toward +x
d) 0.32N toward +x