1. Use the information in the paragraph below to answer the question. The speed of an airplane relative to the ground is affected by wind. When an airplane flies in the same direction of the wind (tailwind), it has greater ground speed. When an airplane flies in the opposite direction of the wind (headwind), it has a smaller groundspeed. Suppose an airplane makes a straight back and forth round trip, always at the same airspeed, between two cities. What type of force is the wind placing on the airplane?
A. Frictional
B. Balanced
C. Gravitational
D. Electrical
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