A projectile is launched in the air for 3 seconds and has a horizontal velocity of 9m/s. How far does the projectile land? A. 27m
B. 9 m
C. 3 m
D. 45 m

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.