(ii) In two parts of the graph in Figure 1 the forces are balanced. State the letters of the two parts of the graph where the horizontal forces
acting on the car are balanced.
121
part
and part

this is the graph:

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.