When a rabbit jumps, the Achilles tendon in its leg is extended. The graph shows how the tendon’s length changes with tension. Calculate the strain energy in the tendon when the tension is $400\,\text{N}$?
- A$0.40\,\text{J}$
- B$0.80\,\text{J}$
- C$2.4\,\text{J}$
- D$7.4\,\text{J}$