A car drives 20 miles north and then 3 miles south. What is the displacement of the car?
A. 23 miles north
B. 23 miles
C. 17 miles north
D. 17 miles

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)