Question

What is the minimum energy required to launch a satellite of mass m from the surface of a planet of mass M and radius R in a circular orbit at an altitude of R?

• A. \( \dfrac{5GmM}{6R} \)
• B. \( \dfrac{2GmM}{3R} \)
• C. \( \dfrac{GmM}{2R} \)
• D. (3GmM)/(4R)

Hint:

For a satellite in circular orbit: E = -(GMm)/(2r) Minimum launch energy is calculated using the change in total mechanical energy.

Answer 1

The Correct Option is D