Question

What is radius of circular orbit of a stationary satellite which remain motionless with respect to earth's surface

Answer 1

Answer:

A satellite that hovers above the earth’s equator and co-rotates with it moving from the west to east with the diurnal angular velocity of the earth appears stationary to an observer on the earth. It is called geostationary. For this calculation, we may neglect the annual motion of the earth as well as all other influences. Then, by Newton’s law, where M = mass of the earth, T = 86400 seconds = period of daily rotation of the earth and r = distance of the satellite from the center of the earth. Then The instantaneous velocity with respect to an inertial frame fixed to the center of the earth .