Final answer:
An airplane should slow to maneuvering speed in turbulence to avoid structural damage, considering factors like acceleration and drag coefficient.
Step-by-step explanation:
An aeroplane entering turbulent flying conditions should be slowed to the maneuvering speed to ensure safety and reduce the risk of structural damage. This speed is determined by the aircraft's design and is the maximum speed at which the full, abrupt control movement can be applied without exceeding the design stress limit of the aircraft's structure. When decelerating for landing, an airplane's acceleration is opposite the direction of its velocity, which is necessary to safely reduce speed. Additionally, factors such as drag coefficient, which can be tested in wind tunnels to understand the effects of air resistance on the plane, also play a role in the aerodynamics of flight. At highway speeds, a lot of a vehicle's power is used to overcome air drag; similar principles apply to aircraft but with different specific factors such as airspeed, air density, and aircraft design influencing the drag experienced.