Escape velocity and orbital energy MCQs – Aerospace January 8, 2026September 11, 2024 by u930973931_answers 5 Score: 0 Attempted: 0/10 1. The escape velocity from Earth’s surface is approximately: (A) 11.2 km/s (B) 7.9 km/s (C) 9.8 km/s (D) 5.0 km/s 2. Escape velocity is defined as the: (A) Minimum velocity an object needs to escape the gravitational influence of a celestial body (B) Maximum speed at which an object can remain in orbit (C) Velocity required to achieve a stable orbit around a celestial body (D) Speed needed to enter a celestial body’s atmosphere 3. The escape velocity from a planet depends on: (A) The planet’s mass and radius (B) The planet’s distance from the Sun (C) The planet’s atmospheric composition (D) The planet’s rotation speed 4. For a given celestial body, the escape velocity increases with: (A) Increasing mass (B) Increasing temperature (C) Increasing altitude (D) Increasing atmospheric pressure 5. The escape velocity from the Moon is approximately: (A) 2.4 km/s (B) 11.2 km/s (C) 7.9 km/s (D) 5.0 km/s 6. Orbital energy is the sum of: (A) Kinetic energy and gravitational potential energy (B) Kinetic energy and thermal energy (C) Gravitational potential energy and atmospheric pressure (D) Kinetic energy and electrical energy 7. In a stable orbit, the total orbital energy of a satellite is: (A) Negative (B) Zero (C) Positive (D) Constant 8. The orbital velocity of a satellite in a circular orbit is: (A) The speed required to maintain a stable orbit around the celestial body (B) The speed needed to escape the gravitational influence (C) The velocity needed to achieve re-entry (D) The speed required to reach the surface 9. The gravitational potential energy of an object in orbit is: (A) Negative (B) Positive (C) Zero (D) Constant 10. To escape Earth’s gravitational pull, an object must reach: (A) Escape velocity (B) Orbital velocity (C) Re-entry speed (D) Maximum velocity