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Acceleration And Velocity Problem

  1. Sep 22, 2014 #1
    I am having a problem in understanding the equation of motions.

    The equation of motion are
    v=u+at
    S=ut +1/2at^2

    Velocity= distance/ time=d/t

    The problem is that if u=0 then
    V=at. Equation.1

    S=1/2at^2
    V=S/t=1/2at not equal to equation 1

    What am I doing wrong??
    Thanx
     
  2. jcsd
  3. Sep 22, 2014 #2
    v = u + a*t gives INSTANTANEOUS velocity at time t.

    But, if you use v = s/t you get the AVERAGE velocity.
     
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