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Newt 2nd Law expt problem

  1. Sep 15, 2014 #1
    1. The problem statement, all variables and given/known data
    How do i compute theoretical acceleration and experimental acceleration?

    xW1il.png

    6uDL1kE.png


    3. The attempt at a solution

    For the first sets of data, the experimental equation, i first averaged the timings.
    Then i used:
    s = ut + 0.5at^2, where u=0
    0.7 = 0.5*a(2.11seconds)^2
    a = 0.3144 m/s^2

    but for theoretical acceleration, this is what i did.

    m1 * g - T = m1 * a (eq 1)

    T = m2 * a (eq 2)

    Sub 2 into 1:
    m1g - m2a = m1 * a
    m1g = m1a + m2a
    m1 g = a(m1+m2)
    a = m1g/(m1+m2)
    a = (0.307*9.81) / (0.307+0.011) = 9.47m/s

    Where did i go wrong?
     
  2. jcsd
  3. Sep 15, 2014 #2

    BvU

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    Which of the two masses 'feels' g ?
     
  4. Sep 15, 2014 #3
    OMG!!. YOU da mvp! Thanks!
     
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