Question

Define orbital velocity of a satellite.Drive expression for the orbital velocity of a satellite. show that the escape velocity of a body from earth 's surface is root2 time its velocity in a circular orbit just above the earth 's surface.

Answer 1

orbital velocity is the minimum velocity it has to maintain to continue its circular motion in its orbit. We know for a circular motion to continue, a force called centripetal force

now
V = [(GM)/r]12