A girl raises an object with mass $1.0\,\text{kg}$ from the floor and places it on a ledge that is $2.0\,\text{m}$ above the floor. How much potential energy does the object gain? [gravitational field strength $g = 10\,\text{N kg}^{-1}$]
- A$2.0\,\text{J}$
- B$5.0\,\text{J}$
- C$10\,\text{J}$
- D$20\,\text{J}$