A learner rubs a plastic rod with a wool cloth. The rod gains a negative electrostatic charge. Before the experiment, the rod had no electrostatic charge. State the one word that means 'having no electrostatic charge'.

Figure shows one way in which the learner could observe the forces exerted by electrostatically charged cloth and rod on each other. Write a brief description of the experiment. Explain how it is done and describe what you would observe.