Final answer:
When an aircraft banked at 45 degrees has the side stick released, modern fly-by-wire systems will automatically act to bring the aircraft back to level flight.
Step-by-step explanation:
When an aircraft is banked at 45 degrees and the side stick is released, the flight control laws of modern fly-by-wire systems like those found in Airbus aircraft will try to bring the aircraft back to level flight.
This is because these systems are designed to maintain stability and ease of handling. In banking, the lift force is tilted to provide a horizontal component for turning, and upon releasing the side stick, the system will automatically correct the bank angle to stop the turn and return to straight, level flight, assuming the aircraft is equipped with such a system.
In a flight control system, when the aircraft is banked at 45 degrees and the side stick is released, the aircraft will tend to roll back to its wings-level position.
This is because of the inherent stability of the aircraft and the action of the flight control system.
When the side stick is released, the flight control system will automatically apply corrective inputs to stabilize the aircraft and bring it back to level flight