Physics (AS & A Level) · May / June 2016 · Paper 11 · Question 21

A sample of material is stretched by a tensile force to a point beyond its elastic limit. The tensile force is then reduced to zero. The graph of force against extension is shown below. Which area represents the net work done on the sample?

1. AX
2. BX + Y
3. CY + Z
4. DZ

As printed in the paper