Question

What is the critical velocity of a satellite very close to Earth's surface?

Options

• 11.2 km/s

• 5.6 km/s

• 7.92 km/s

• 3.96 km/s

Answer 1

7.92 km/s

Explanation:

For a satellite close to Earth's surface, v_c = √(gR) = 7.92 km/s. This is the maximum possible critical velocity.