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Suppose a 1,600 kg car is traveling at 20.0 m/s. What average force is needed to stop the car in 4.0 s? Can you explain to me how you got your answer, thank you.

  • Physics -

    (Avg. Force)*(time) = Momentum change
    = 1600*20 kg m/s

    Avg. Force = 32,000/4.0 = 8000 Newtons

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