An airplane flies 120 km at a constant altitude in a direction 30.0° north of east. A wind is blowing that results in a net horizontal force on the plane due to the air of 2.40 kN in a direction 10.0° south of west
How much work is done on the plane by the air?
A) -2.71 × 108 J
B) -0.985 × 108 J
C) -221 × 108 J
D) 221 × 108 J
E) 0.821 × 108 J
Answer: A
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