A runner circles a track of radius 100 m in 100 s moving at a constant rate. If the runner was initially moving east, what has been the runner's average acceleration when halfway around the track?
A) At a constant rate, the average acceleration would be zero.
B) 0.13 m/s2, south
C) 0.25 m/s2, west
D) No answer is correct.
Correct Answer:
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