A parachutist with mass $60\,\text{kg}$ descends at a constant speed of $10\,\text{m s}^{-1}$. The gravitational field strength $g$ is $10\,\text{N kg}^{-1}$. What upward force is acting on the parachutist?
- A$0\,\text{N}$
- B$6.0\,\text{N}$
- C$60\,\text{N}$
- D$600\,\text{N}$