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Which of the following expresses the con- dition required for the system to be in sta

  1. Oct 25, 2009 #1
    1. The problem statement, all variables and given/known data
    Consider the wheel-and-axle system shown
    below.
    a
    b
    m1 m2
    Which of the following expresses the con-
    dition required for the system to be in static
    equilibrium?
    1. b2m1 = a2m2
    2. a2m1 = b2m2
    3. am2 = bm1
    4. am1 = bm2
    5. m1 = m2
    003 10.0 points
    Nobody at the playground wants to play with
    an obnoxious boy, so he fashions a seesaw as
    shown so he can play by himself.
    Explain how this is done.
    1. The angular velocity of the boy is can-
    celled with that of the board.
    2. The weight of the boy is balanced by the
    weight of the board.
    3. The fulcrum is very far from the boy.
    4. The weight of the boy is balanced with an
    unknown heavy metal.
    004 (part 1 of 3) 10.0 points
    A solid sphere of radius R and mass M is
    held against a wall by a string being pulled at
    an angle θ . f is themagnitude of the frictional
    force and W = M g .

    To what does the torque equationX
    i
    ~τi = 0
    about point O (the center of the sphere) lead?
    1. F cos2 θ = f
    2. F +W =


    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Oct 25, 2009 #2
    Re: Which of the following expresses the con- dition required for the system to be in

    uhh.. you may want to clarify this post... What exactly are you asking?

    --save the copy and paste, retype clearly what the problem is, and WHICH of the problems would you like help with: #002 or #003 or #004? if you can, include the diagram of the corresponding problem.

    and lastly, perhaps you should re-evaluate which forum this question belongs in... I'm not sure that this is advanced physics, it sound like kinematics or dynamics. Take a look at the other questions in this forum, are you familiar with the subject matter...?
     
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