Physics (AS & A Level) · Feb / March 2021 · Paper 12 · Question 20

A wire is stretched by applying increasing values of force F. For each value of force applied, the extension x is recorded. A force–extension graph is plotted from the data obtained. Which statement about the area under the graph must be correct?

1. AIt can be calculated as \frac{1}{2}Fx.
2. BIt is the elastic potential energy stored in the stretched sample.
3. CIt is the work done in stretching the sample.
4. DIt would be the same for any wire of the same material.

As printed in the paper