Question

The escape velocity of a body from the surface of the earth is 11.2 km/s. If a satellite were to orbit close to the surface, what would be its critical velocity?

Answer 1

Escape velocity of body from the surface of the earth = 11.2 km/s

`v_e=sqrt2v_0`

`v_0=v_e/sqrt2`

`v_0=(11.2xx10^3)/1.414`

v₀ = 7.92×10³ m/s or  7.92 km/s