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Question
An airplane is flying north at 500 km/h. It makes a gradual 180°turn at constant speed, changing its direction of travel from north through east to south. The process takes 40 s. The average acceleration of the plane for this turn is:
A) 12.5 km/h.s, north
B) 12.5 km/h.s, east
C) 12.5 km/h.s, south
D) 25 km/h.s, north
E) 25 km/h.s, south
Answer
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