A satellite of mass is in circular orbit above the Earth’s surface

PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A satellite of mass

500\,\text{kg}

is in circular orbit

400\,\text{km}

above the Earth’s surface. The mass of the Earth is

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

and its radius is

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

. Calculate the gravitational force exerted by the Earth on the satellite. Give your answer correct to two significant figures.

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