Physics

Problem

The surface gravity of Mars is

3.7\,\text{m\,s}^{-2}

and its radius is

3.4\times10^{6}\,\text{m}

. What is the minimum speed that a spacecraft must have at launch (neglecting atmosphere) to escape from the Martian surface? a)

6.3\,\text{km\,s}^{-1}

3.5\,\text{km\,s}^{-1}

5.0\,\text{km\,s}^{-1}

7.9\,\text{km\,s}^{-1}