Take a positive red ball from the box and place it directly south of the puck. An arrow will show up on the puck, indicating the size and direction of the electrostatic force the red charge applies to the black charge. As the red charge is brought closer to the black charge, the force on the black charge A. decreases. B. increases. C. stays the same.

The ratio of the electrostatic force to the gravitational force is different between two electrons and two protons. Why? I. The magnitude of the fundamental charge of an electron is different from a proton. II. Electrons and protons have different masses. III. False. The ratio is the same     A. III only B. Both I and II only C. II only D. I only

4. Three identical metal balls A, B, and C are mounted on insulating rods. Ball A has a charge +q and balls B and C are initially uncharged (g is the usual symbol for electric charge). Ball A is touched first to ball B and then separately to ball C. At the end of this experiment, the charge on ball A is A. +g/2. B. +g/3. C. +g/4. D. none of the answers

If, in Step 5, Spheres A and C are separated by a distance of r = 2.0 m and q = 1.0 C, determine the magnitude of the electrostatic force between Spheres A and C.