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Homework Help: Atwood machine (Forces and Motion) (Greater than; Less than; Equal to; True or False)

  1. Feb 21, 2010 #1
    1. The problem statement, all variables and given/known data

    A frictionless, massless pulley is attached to the ceiling, in a gravity field g = 9.81 m/s2. Mass Mb is greater than mass Ma. The tensions Tx,Ty, Tz, and the constant g are magnitudes. (Select a response for each statement.)

    Please look at this pic:
    http://i995.photobucket.com/albums/af79/huybinhs/atwoodmachine.png

    Choices:
    Greater than; Less than; Equal to; True or False.

    The center-of-mass of Mb and Ma accelerates.
    Ty is .... (Mb)g.
    Tz is .... (Ma)g + (Mb)g.
    Tx+Ty is .... Tz.
    The magnitude of the acceleration of Mb is .... that of Ma.
    Tx is .... Ty.



    2. Relevant equations

    F = ma



    3. The attempt at a solution

    1 Incorrect. (Try 1)
    True
    Less than
    Equal to
    Equal to
    Equal to
    Equal to

    2 Incorrect. (Try 2)
    True
    Less than
    Greater than
    Equal to
    Equal to
    Equal to

    3 Incorrect. (Try 3)
    True
    Less than
    Greater than
    Less than
    Equal to
    Equal to

    4 Incorrect. (Try 4)
    False
    Less than
    Greater than
    Less than
    Equal to
    Equal to

    5 Incorrect. (Try 5)
    False
    Less than
    Equal to
    Equal to
    Equal to
    Equal to

    6 Incorrect. (Try 6)
    False
    Less than
    Equal to
    Greater than
    Equal to
    Equal to
     
  2. jcsd
  3. Feb 21, 2010 #2

    kuruman

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Re: Atwood machine (Forces and Motion) (Greater than; Less than; Equal to; True or Fa

    What is your thinking about answering these questions? Why did you give these particular answers to these tries? How do you think the "Relevant Equation" F = ma applies to all this?
     
  4. Feb 22, 2010 #3
    Re: Atwood machine (Forces and Motion) (Greater than; Less than; Equal to; True or Fa

    Hey Binh,

    Did you figure this one out yet? I have racked my brain and researched, but no luck and I've already used 8 tries...
     
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