A ball's velocity in the z-direction at two time instants is (0.55+0.03 m/s, 2.2±0.1 s) and (0.61+0.02 m/s, 3.1±0.2 s). The ball's average acceleration and the uncertainty in the average acceleration in the z- direction in m/s2 are and
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Q: how does the 2pif=Kmf become 12pikm
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