Question 3 Three small, identical metal spheres, Q, Q, and Q, are placed in a vacuum. Each sphere carries a charge of-4 μC. The spheres are arranged such that Q, and Q, are each 3 mm from Q, as shown in the diagram below. 13 mm 3.1 State Coulomb's law in words. (2) 3.2 Draw a force diagram showing the electrostatic forces exerted on Q, by Q₂ and Q. (2) 3.3 Calculate the net force exerted on Q, by Q, and Qu. (8) [12]
