If two bicyclists move around a circular track of radius 100 m, at the same speed, 10 m/s, but in opposite directions, then
A. they have equal size accelerations, 1 m/s2.
B. they might have different accelerations, depending on whether they have identical mass or not.
C. they have opposite accelerations, +1 m/s2 (inward) and -1 m/s2 (outward).
D. one has centripetal acceleration of 1 m/s2 and the other has centrifugal acceleration of 1 m/s2.
Answer: A
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