Physics

Problem

Approximate the Earth as a sphere of mass

6.0\times10^{24}\,\text{kg}

and radius

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

. Using

G=6.67\times10^{-11}\,\text{N}\,\text{m}^2\,\text{kg}^{-2}

, determine the escape speed from Earth’s surface. a)

15.8\,\text{km}\!/\!\text{s}

7.9\,\text{km}\!/\!\text{s}

11.2\,\text{km}\!/\!\text{s}

22.4\,\text{km}\!/\!\text{s}