Question

An artificial satellite is moving in a circular orbit of radius $42250km$. Calculate its speed if it takes $24$ hours to revolve around the earth.

Answer 1

Satellite is moving in a circular orbit radium of satellite $r=42250km$

Time $t=24Hrs=3600\ast 24s$

$V=\frac{2\pi r}{t}$

$=2\times \frac{22}{7}\times 42250$

$=\frac{2\times 22\times 42250}{7\times 3600\times 24}$

$=\frac{92950}{30240}=3.07$

$\therefore$ Speed of the satellite when it moves in circular orbit $=3.07km{s}^{-1}$.