Question

What is the orbital velocity of a satellite in a circular orbit 300km above the surface of the earth?

Answer 1

Explanation:

for a circular orbit at a height of 300 km above the Earth's surface, a speed of 7.8 km/s (28,000 km/h) is needed. At this speed, the satellite will complete one orbit around the Earth in 90 minutes. Satellites have to move so quickly in order to compensate for the pull of Earth's gravity.