A box with mass $2.0\,\text{kg}$ is dragged along a horizontal floor by a force of $6.0\,\text{N}$. The frictional force on the box is $1.0\,\text{N}$. What is the acceleration of the box?
- A$0.40\,\text{m s}^{-2}$
- B$2.5\,\text{m s}^{-2}$
- C$3.0\,\text{m s}^{-2}$
- D$3.5\,\text{m s}^{-2}$