A student investigates the factors affecting the bend angle θ of a metal strip. The student places a thin straight metal strip on two supports and attaches a mass of weight W to the middle of the strip. The metal strip bends as shown in Fig. 4.1. [Figure 4.1] Plan an experiment to investigate one variable affecting the bend angle θ shown on Fig. 4.1. You are not required to do this investigation. In your plan, you should: • explain briefly how to carry out the investigation, including how you will measure θ • state the variables to control • draw a table, or tables, with column headings, to show how to display your readings (you are not required to enter any readings in the table) • explain how to use your readings to reach a conclusion. You may draw a diagram if you think this will help your plan.