In an elastic collision, an object with momentum 25 kg⋅m/s collides with another that has a momentum 35 kg⋅m/s. The first object’s momentum changes to 10 kg⋅m/s. What is the final momentum of the second object?

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.