A barrel with weight $1.0 \times 10^3\,\text{N}$ is shown on a frictionless slope that is inclined at $30^\circ$ to the horizontal. A force is used to push the barrel so that it moves up the slope at constant speed. This force acts parallel to the slope. What is the work done in moving the barrel a distance of $5.0\,\text{m}$ up the slope?
- A$2.5 \times 10^3\,\text{J}$
- B$4.3 \times 10^3\,\text{J}$
- C$5.0 \times 10^3\,\text{J}$
- D$1.0 \times 10^4\,\text{J}$