An apple with mass $0.15\,\text{kg}$ and weight $1.5\,\text{N}$ is dropping from a tree. At one stage of its fall, the air resistance acting on the apple is $0.60\,\text{N}$ upwards. What is the acceleration of the apple at this stage?
- A$4.0\,\text{m s}^{-2}$
- B$6.0\,\text{m s}^{-2}$
- C$10\,\text{m s}^{-2}$
- D$14\,\text{m s}^{-2}$