A 800kg car produces a motive force of 10,000N. As it accelerates from rest it experiences a frictional resistance of 2,000N.
What is the net force acting on the car?

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.