rolling ball moves from x1 = 8.2 cm to x2 = -4.5 cm during the time from t1 = 2.8 s to t2 = 6.7 s
Average velocity, v = (x2 - x1)/(t2 - t1)
V = (-4.5 - 8.2)/(6.7 - 2.8) = 3.26 cm/sec
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rolling ball moves from x1 = 8.2 cm to x2 = -4.5 cm during the time...
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