38. Speed (cont.) d in m t in s v = m/s same at all times total distance total time General Formula: Variations: instantaneous uniform average v at 1 point in time v = d t distance time
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65. Example before collision collision occurs after collision m 1 v 1 = 1 kg m/s mv = 0 mv = 0 m 2 v 2 = 1 kg m/s
66. Example #2 m 1 v 1 = 5 kg m/s mv = 0 m 2 v 2 = 5 kg m/s before collision collision occurs after collision m 2 = m A + m B v 2 = v A + v B A B A B