A student whose mass is $60\,\text{kg}$ ascends a set of steps. The student moves $2.0\,\text{m}$ horizontally and rises $1.5\,\text{m}$ vertically. Take the gravitational field strength $g$ to be $10\,\text{N kg}^{-1}$. What is the work done against the force of gravity?
- A$90\,\text{J}$
- B$120\,\text{J}$
- C$900\,\text{J}$
- D$1200\,\text{J}$