Which example illustrates newtons first law? A the force of a wheel barrel on the ground in the opposite direction of the force of the ground on the wheel barrel be more mass is added to a wheel barrel and a large force is required to move it

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.