일반물리학 1 · Motion in Two and Three Dimensions · Problem 74
일반물리학 1 — Motion in Two and Three Dimensions: Problem 74
74 After flying for 18 min in a wind blowing 42 km/h at an angle of 20° south of east, an airplane pilot is over a town that is 55 km due north of the starting point. What is the speed of the airplane relative to the air?
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