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Homework Help: Acceleration problem

  1. Feb 19, 2007 #1
    1. The problem statement, all variables and given/known data
    I have been given a set of results to analyse, regarding acceleration of a free fall object in a peice of paper, (100g mass, 10cm card) falling through a light gate at different heights, i am having problems with working out the acceleration using formulae.
    Distance from gate = 0.02m
    Time = 0.163 seconds.
    U = 0 i presume..or maybe not(part of my problem)
    S = 0.1 (the length of the card)

    2. Relevant equations
    s = ut + 1/2at(squared)

    3. The attempt at a solution
    I have got 9.15 once but i think it was a coincedence.
  2. jcsd
  3. Feb 20, 2007 #2
    For the lighter objects, you have to take the air resisatance into account. The answer you got correct, would probably have been for a heavier object cause the air resistance is negligible for them.
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