An Airplane Flies 120 Km at a Constant Altitude in a Direction

question 24

Multiple Choice

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

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