Question

an airplane flies through the air. the airplane is moving to the left. complete the free body diagram by labeling the forces acting on the airplane. click each dot on the image to select an answer. thrust (fth) lift (fl) gravity (fg) 8 of 10

Explanation:

Step1: Identify upward - acting force

The lift force ($F_{L}$) acts upwards to counter - act the weight of the airplane and keep it in the air. It should be labeled on the upper part of the airplane in the free - body diagram.

Step2: Identify downward - acting force

Gravity ($F_{g}$) acts downwards, pulling the airplane towards the Earth. It should be labeled on the lower part of the airplane in the free - body diagram.

Step3: Identify forward - acting force

The thrust ($F_{Th}$) is the force that propels the airplane forward (in this case to the left as described). It should be labeled in the direction of the airplane's motion.

Step4: Identify opposing force (not shown in given options but conceptually important)

There is also drag force which acts opposite to the direction of motion of the airplane, but it is not part of the given options for labeling.

Answer:

The lift ($F_{L}$) should be labeled above the airplane, the gravity ($F_{g}$) should be labeled below the airplane, and the thrust ($F_{Th}$) should be labeled in the direction of the airplane's left - ward motion.