Physics

Problem

Calculate the speed (in

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

) of a satellite in a circular orbit

400\,\text{km}

above Earth's surface. Take

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

M_{\rm E}=6.0\times10^{24}\,\text{kg}

and

R_{\rm E}=6.4\times10^{6}\,\text{m}

. a)

10.9

8.2

7.7

9.8