What is the effect of increased thrust on aircraft performance?

Increased thrust has a direct and beneficial effect on an aircraft's performance, particularly in its ability to either climb or accelerate. When thrust is enhanced, the engine produces more power, allowing the aircraft to overcome drag more effectively. This increase in power translates into a higher speed, giving the aircraft the ability to accelerate, especially in level flight.

Additionally, with more thrust, an aircraft can generate the necessary lift to climb against the force of gravity. As the thrust surpasses the drag, the aircraft's speed increases, and it can climb more efficiently. Therefore, the correct interpretation of the relationship between thrust and performance is that additional thrust provides the necessary energy for both acceleration and climbing, facilitating improved overall aircraft performance during various flight phases.

Other options do not accurately reflect the relationship between thrust and aircraft behavior.