Example 1 · difficulty 2/5
The escape speed from the surface of the Earth is 11.2 km s⁻¹. Another planet has the same mean density as the Earth but its radius is half that of the Earth. The escape speed from the surface of this planet is:
- A. 22.4 km s⁻¹
- B. 11.2 km s⁻¹
- C. 5.6 km s⁻¹
- D. 2.8 km s⁻¹