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Homework Help: Accerleration of mass

  1. Nov 29, 2008 #1
    1. The problem statement, all variables and given/known data
    A small mass is placed on a record turntable that is rotating at 45 rpm. The acceleration of the mass is
    a. greater the farther the mass is from the center
    b. greater the closer the mass is to the center
    c. independent (in magnitude) of the position of the mass on the turntable
    d. directed perpendicular to the line joining the mass and the center of rotation
    e. zero

    2. Relevant equations
    arad= w^2*r
    atan= alpha*r
    a= (atan^2+arad^2)^1/2

    3. The attempt at a solution
    I think the answer is solution A becuase both atan and arad are dependent on the radius of the location of the mass. I am not completely sure this is correct because it seems too easy
  2. jcsd
  3. Dec 2, 2008 #2
    When I was a child we had roundabouts in public parks. If you sat near the centre it was easy to hang on, but if you moved to the outside you needed all your strength to stay aboard.
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