A crate with mass $50\,\text{kg}$ is moved $6.0\,\text{m}$ across a horizontal surface while a constant resistive force of $70\,\text{N}$ opposes the motion. The crate travels at constant speed. It is then raised, still at constant speed, through a vertical height of $1.2\,\text{m}$ onto the back of a lorry. What is the total work done in this process?
- A$420\,\text{J}$
- B$480\,\text{J}$
- C$590\,\text{J}$
- D$1000\,\text{J}$