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physics

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A freight train has a mass of 3.2 × 107 kg.
If the locomotive can exert a constant pull
of 7.1 × 105 N, how long would it take to
increase the speed of the train from rest to
74.6 km/h? (Disregard friction.)

  • physics - ,

    change the speed to m/s

    F=ma

    F=m (change in velocity/time)
    F=m * Vfinal/time
    solve for time.

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