A satellite is to be placed in a circular orbit above the Earth’s surface

PHYSICS · Subjective · CBSE · Physics · Gravitation · Gravitation

Problem

A satellite is to be placed in a circular orbit

400\,\text{km}

above the Earth’s surface. Take Earth’s radius

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

, Earth’s mass

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

and

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

. Calculate its orbital speed, giving your answer to one decimal place in

\text{km s}^{-1}