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18 January, 08:55

A 6,600 kg train car moving at + 2.0m/s

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Answers (2)
  1. 18 January, 09:08
    0
    The answer is v = -.2 5
  2. 18 January, 09:10
    0
    Assuming the whole question is this:

    A 6600 kg train car moving at + 2.0 m/s bumps into and locks together with one of mass 5400 kg moving at 3.0 m/s. What is their final velocity?

    you would do:

    6600 (2) - 5400 (3) = (6600+5400) v

    13200 - 16200 = 12000v

    v = - 0.25 m/s
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