Question

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

Answer 1

We know that for any body total distance covered is equals to the circumference of that circular track.

so,circumference of circular track=2$\pi$r=2$\times$$\pi$$\times$42250=265572km

So,Distance=Speed$\times$time

$Speed=\frac{Distance}{time}=\frac{265572}{24}=11065.4km/hr=3073.74m/sec$