An airplane makes a gradual 90 turn while flying at a constant speed of 200 m/s. The process takes 20.0 seconds to complete. For this turn the magnitude of the average acceleration of the plane is:
A) zero
B) 40 m/s2
C) 20 m/s2
D) 14 m/s2
E) 10 m/s2
Correct Answer:
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