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    Beltan_89's Avatar
    Beltan_89 Posts: 1, Reputation: 1
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    #1

    Oct 25, 2007, 10:30 PM
    Motion
    A moving trian with a velocity of 51 m/s east undergoes an acceleration of 2.3 m/s as it approaches a town. What is the velocity of the train 5.2 safter it has begun to decelerate?
    terryg752's Avatar
    terryg752 Posts: 197, Reputation: 4
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    #2

    Oct 26, 2007, 02:33 AM
    I think you mean that 2.3 is deceleration and you want velocity after 5.2 seconds

    If velocity is u and acceleration is a the velocity after time t is v, where

    v = u + at

    In your case, u = 51, a = -2.3 and t = 5.2 seconds

    Substitute and get v
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