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13 March, 20:26

If a speeding train hits the brakes and it takes the train 39 seconds to go from 54.8 m/s to 12 m/s what is the acceleration?

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Answers (2)
  1. 13 March, 20:44
    0
    -1.09m/sec^2

    Explanation:

    Acceleration = (Vf-Vi) / Time

    =12-54.8

    = - 42.8

    = - 42.8/39

    =-1.09

    -ve sign is due to recoil of train

    as it suddenly hits brakes.
  2. 13 March, 20:46
    0
    Answer:1.097 m/s^2

    Explanation:

    a = (final velocity - initial velocity) / time

    = (54.8-12) / 39

    =1.097 m/s^2
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