A 29000 lb engine is pulling two freight cars up a 1.3 % incline. The weight of the first freight car is 29000 lbs, and the weight of the second freight car is 10500 lbs. The train is accelerating at 0.33 ft/s2 as it goes up the hill.

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.