16. (a) For the net force to be in the +xdirection, the ycomponents of the individual forces must cancel. The angle of the force exerted by the q1= 40 µC charge on 320qCµ=is 45°, and the angle of force exerted on q3by Qis at –θwhere θ=FHGIKJ=°−tan....12 030337Therefore, cancellation of ycomponents requires ()()1332222||sin 45sin0.022(0.030)(0.020)q qQ qkkθ° =+from which we obtain |Q| = 83 µC. Charge Qis “pulling” on
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