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Homework Help: How to find the angular velocity for this question?

  1. Apr 26, 2015 #1
    1. The problem statement, all variables and given/known data
    Finding angular velocity after impact

    2. Relevant equations
    Moment of inertia x angular velocity = constant

    3. The attempt at a solution
    Hi, I believe that angular momentum is conserved in this case?
    If thats the case, how do I use the formula to calculate angular velocity if the intial angular velocity is already 0?

    Attached Files:

  2. jcsd
  3. Apr 26, 2015 #2


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    If there is angular momentum after the impact but not before, then AM canot be conserved.

    The bar is fallling at an angle of 60°. After it hits the ground, one end is anchored to the ground and the bar begins to rotate.

    Generally, momentum is not conserved in a collision with the Earth, unless you include the Earth in your system.
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