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Help! Equation needed

  1. Nov 14, 2007 #1
    I am studying A Level Physics, and for a piece of coursework i conducted an experiment using an air track. It involved using masses on a piece of string to pull a vehicle. I had two light gates set up to measure the time from a to b, however the first light gate was not set so that the initial velocity was zero..

    Could anyone give me an equation to work out either, acceleration, initial velocity, or final velocity?

    The masses go at intervals as follows, these are in grams..
    20
    40
    60
    80
    100
    120
    140
    160
    180
    200

    The average time for each of these is shown below (the same order as above) all of these are in seconds..

    1.772
    1.004
    0.82
    0.616
    0.54
    0.508
    0.472
    0.45
    0.436
    0.414


    The distance between the two gates is 0.89m and the mass of the vehicle is 410grams


    Any help would be great thanks.
     
  2. jcsd
  3. Nov 14, 2007 #2

    Kurdt

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    What force will be acting on the vehicle? Once you know the force you can work out the acceleration and use the kinematic equations.
     
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