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Angular Momentum Problem formula

  1. Nov 15, 2008 #1
    Ive been trying to figure this problem for a while and Im stumped, If anyone has any ideas
    Id really appreciate it - The problem deals with conservation of angular momentum
    and the answer is provided but I don't know how to get there

    please see the attached image of the problem>>

    Thanks :approve:

    Attached Files:

  2. jcsd
  3. Nov 15, 2008 #2


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    Homework Helper

    Hi blue-steel,

    I don't think that is right; this problem deals not with the conservation of angular momentum, but with the change in angular momentum. What formula gives you the change in angular momentum of a system?

    Once you have that formula, you can almost just plug in the numbers to get your answer. What do you get?
  4. Nov 16, 2008 #3
    Hi alphaphysicist

    I tried the Sum of all moments = change in angular momentum formula, it took me a while to figure out how to work with the cross products but I got the answer in the end, thanks :wink:
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