A satellite is in a geostationary orbit at a distance of from Earth’s centre

PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A satellite is in a geostationary orbit at a distance of

4.2\times10^{7}\,\text{m}

from Earth’s centre. Using

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

and

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

, calculate: (i) its orbital speed. (ii) its kinetic energy per unit mass.