The graph plots the momentum of a cyclist over an interval of $8.0\,\text{s}$. At time $4.0\,\text{s}$, she applies the brakes. What is the resultant force on the cyclist during the time when the brakes are applied?
- A$55\,\text{N}$
- B$200\,\text{N}$
- C$270\,\text{N}$
- D$450\,\text{N}$