Calculate the orbital speed (in

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

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

, correct to one decimal place) of a satellite circling the Earth at an altitude of

400\,\text{km}

above the surface. (Take

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

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

, and

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

.) (a)

10.9

(b)

5.9

(c)

7.7

(d)

8.1