An object moves with constant velocity over a horizontal layer of ice. Friction is negligible. A constant horizontal force of $2.1\,\text{N}$ is then exerted on the object, as shown. After a short interval following the application of the force, the object arrives at point X, which is at a displacement of $4.0\,\text{m}$ from the position where the force was first applied. What is the work done by the force on the object as it moves to point X?
- A$4.2\,\text{J}$
- B$4.8\,\text{J}$
- C$7.3\,\text{J}$
- D$8.4\,\text{J}$