A box with a mass of $2.0\,\text{kg}$ moves down a slope. The gravitational field strength is $9.8\,\text{N kg}^{-1}$. What decrease in the gravitational potential energy stored is there as the box travels from P to Q?
- A$9.8\,\text{J}$
- B$98\,\text{J}$
- C$240\,\text{J}$
- D$250\,\text{J}$