A student rides a bicycle on a level road at a speed of $5.0\,\text{m s}^{-1}$. The combined mass of the student and bicycle is $120\,\text{kg}$. The student uses the brakes and comes to rest. The braking distance is $10\,\text{m}$. What is the average braking force?
- A$150\,\text{N}$
- B$300\,\text{N}$
- C$15\,000\,\text{N}$
- D$30\,000\,\text{N}$