At the surface of a planet, $30\,\text{J}$ of work is done against gravity in lifting a mass of $1.0\,\text{kg}$ by a height of $10\,\text{m}$. How much work is needed to lift a mass of $4.0\,\text{kg}$ by a height of $5.0\,\text{m}$ on this planet?
- A$15\,\text{J}$
- B$60\,\text{J}$
- C$120\,\text{J}$
- D$200\,\text{J}$