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Homework Help: Atwood machine

  1. Oct 29, 2008 #1
    1. The problem statement, all variables and given/known data

    I have 3 graphs: accleration vs. total mass, acceleration vs. mass difference, and acceleration vs. inverse total mass.

    How can I get the gravitational acceleration from these 3 graphs ?

    I am doing a lab report on word and excel

    2. Relevant equations

    I don't think there is one, may be it will be the slope ??

    3. The attempt at a solution

    I think finding the slope of those graphs ? But what wil be the relationship between slope and gravitational acceleration ?
  2. jcsd
  3. Oct 29, 2008 #2
    Can anyone give some inputs. I really need help now. My lab is due tomorrow.
  4. Oct 30, 2008 #3
    What do you guys think is the relationship between gravitational force and those 3 graphs ?
  5. Oct 30, 2008 #4
    For a system with only two masses over a single pulley:

    [tex] a = \frac{(m1 - m2)g}{m1 + m2} [/tex]

    so acceleration is directly proportional to mass difference (m1 - m2), and directly proportional to "inverse total mass" 1/(m1 + m2).
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