What specific physical quantity ensures a satellite maintains its orbit without continuous propulsion?

Correct option is C

The correct answer is (c) Orbital velocity.
• A satellite remains in orbit when its forward (tangential) velocity balances gravity.
• Proper orbital velocity ensures continuous free-fall around Earth.
• No continuous propulsion is required once stable orbit is achieved.
Information Booster:
• Low Earth Orbit requires ~ 7.8 km/s orbital speed.
• Gravity provides the centripetal force.
• Different orbits require different velocities.
Additional Knowledge:
• Atmospheric drag slows satellites in low orbits.
• Mass does not determine orbital stability directly.
• Gravity alone would cause the satellite to fall without sufficient velocity.