a. What is the tangential velocity of a satellite in a circular orbit 300km above the surface of the Earth?
b. How long does the satellite take to complete one orbit? (i.e. find its period)
Hint: The centripetal force is provided by gravity. Start with G*M*m/r2 = m v2/r.
r = distance from the center of the Earth.
radius of earth = 6,378 km
G = 6.673e-11 m3/(kg s2)
mass of earth = 6e+24 kg