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Homework: Acceleration of a rocket along a track

  1. Aug 18, 2007 #1
    1. The problem statement, all variables and given/known data

    th rocket driven sled sonic wind no. 2 used for investigating the physiological effects of large accelerations, runs on a straight, level track 1070m long. Starting from rest. it can reach a speed of 224m/s in 0.900s

    compute for its acceleration assuming that it is constant

    2. Relevant equations
    im confused which equations do i have to use
    is it
    Vf=V+at
    Vf2]=V2+2ax or
    x=Vt+1/2at2

    my v=0, Vf=224m/s, t=.900s, x=1070
    is this correct?
     
  2. jcsd
  3. Aug 18, 2007 #2
    Even more simple than that. What is acceleration? It's the rate of change of velocity with respect to time. So, mathematically:

    [tex]a=\frac{\Delta v}{\Delta t}[/tex]

    So, average acceleration is the change in velcity divided by the change in time (which is just another way of writing the first equation you wrote)
     
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