2.00 m apart. (a) Calculate the electrostatic force acting on the two charges. "(b) The spheres are touched together and returned to their original positions. Calculate the new electrostatic force acting on them. 8. Three charges are placed in a line, as shown in the diagram below. 2.00 m 3.00 m A B C 2.00 mC + 3.00 mC 2.00 mC (a) What is the net electrostatic force on charge A? (b) What is the net electrostatic force on charge B? Extensions 9. A helium nucleus has a positive charge with a magnitude twice that of the negative charge on an electron. Is the electrostatic force of attraction on an electron in a force acting