Energy, work and power — practice question

A box with mass $2.0\,\text{kg}$ and weight $20\,\text{N}$ is taken up to the top of a staircase. How is the work done against gravity on the box worked out?

• A$2.0 \times 1.8$
• B$20 \times 1.2$
• C$2.0 \times 1.2$
• D$20 \times 1.2 \times 1.8$