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A car (mass = 1100 kg) is traveling at 33.0 m/s when it collides head-on with a sport utility vehicle (mass = 2800 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?

  • physics -

    final momentum=0, so sum of vehicles' momenta is 0.

    1100*33 + 2800*v = 0
    36300 = -2800v
    v = -12.96

    speed is just 12.96 m/s

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