Final answer:
Lowering the flaps on an airplane wing increases lift by increasing wing area and camber, which increases the wing's ability to deflect air downward. Drag is also increased due to the added surface area and altered wing aerodynamics.
Step-by-step explanation:
When you lower the flaps on an airplane wing, the lift component is increased because the wing area increases and the camber of the wing is enhanced. This modification changes the wing's shape and increases its ability to deflect air downward, thereby adhering to Bernoulli's principle and creating greater lift.
As for drag, this force is also affected by the deployment of flaps; it increases. This occurs because the flaps alter the wing's aerodynamics, adding surface area that the air has to move around, leading to greater air resistance. During landing and takeoffs, this trade-off between increased lift and increased drag is critical to ensure that the aircraft can fly at lower speeds without stalling.