After the collision, car 1 has a final velocity of 6m/s south. What is the final velocity of car2? a) 35m/s north
b) 35m/s south
c) 81 m/s north
d) 81 m/s south

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.