A 10.0 kg bowling ball is moving at 10 m/s when it strikes a 20 kg bowling pin. After the collision, the pin moves forward at 15 m/s. How fast is the ball moving after it hits the pin?

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.