What is thrust and what generates it?

What is thrust and what generates it?

• A. The rearward resistance from air opposing motion.
• B. The upward force from wings due to airspeed.
• C. The forward force produced by the propulsion system to overcome drag.
• D. The gravitational force acting downward.

Answer: (C)

Thrust is the forward force produced by the propulsion system that pushes the aircraft through the air and overcomes drag. It comes from engines, propellers, or rockets, and works through Newton’s third law: by pushing air rearward, the aircraft is pushed forward. This forward force must counteract drag, the air’s resistance acting opposite to motion. In steady, level flight, thrust roughly equals drag; more thrust means speeding up, less thrust means slowing down. Lift is the upward force from the wings due to airspeed, and weight is the downward force due to gravity, so they’re separate from thrust.

Thrust is the forward force produced by the propulsion system that pushes the aircraft through the air and overcomes drag. It comes from engines, propellers, or rockets, and works through Newton’s third law: by pushing air rearward, the aircraft is pushed forward. This forward force must counteract drag, the air’s resistance acting opposite to motion. In steady, level flight, thrust roughly equals drag; more thrust means speeding up, less thrust means slowing down.

Lift is the upward force from the wings due to airspeed, and weight is the downward force due to gravity, so they’re separate from thrust.