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Homework Help: Pendulum and kinetic energy

  1. Feb 13, 2012 #1
    1. The problem statement, all variables and given/known data
    A pendulum is released at A and caught by a peg as it passes through the
    vertical, B. To what height will the bob rise on the right?

    2. Relevant equations
    None given

    3. The attempt at a solution
    I really am unsure about how I am supposed to figure the height when no numbers were given. Thank you for any help!
  2. jcsd
  3. Feb 13, 2012 #2


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    Homework Helper

    Presumably the answer will be an algebraic expression in terms of the two masses and the original height.

    If numbers make you more comfortable, you could invent your own and calculate.

    Then re-write your answer using h, M and m in place of you numbers, which should only prevent combinations of this numbers.
    eg: first time you might have a 3 multiplied by a 5 which you would write as 15, second time through you may have M multiplied by m, which you would write as Mm.
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