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Homework Help: An erect pencil on a frictionless plane

  1. Oct 3, 2011 #1
    1. The problem statement, all variables and given/known data

    A pencil is released from rest with θ = pi/2 and topples over. Treat the pencil as a uniform rod and find the velocity of the end A when it strikes the table if the table is frictionless.

    2. Relevant equations

    Classical Mechanics

    3. The attempt at a solution

    conservation of energy? not sure
    conservation of momentum? doesn't seem to work
  2. jcsd
  3. Oct 4, 2011 #2


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    Homework Helper

    What part of Classical Mechanics do you think of?

    Is there any force which does work and is not conservative?

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