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Homework Help: No clue, any hints

  1. Dec 16, 2004 #1
    http://home.earthlink.net/~urban-xrisis/phyyy002.jpg [Broken]

    I'm really not sure what to do here. ANY hints would be helpful.
    Last edited by a moderator: May 1, 2017
  2. jcsd
  3. Dec 16, 2004 #2

    Doc Al

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    Staff: Mentor

    You'll need to use conservation of energy and Newton's 2nd law (consider centripetal acceleration). Hint for part b: At the top of the motion there is a minimum speed to maintain a taut string.
  4. Dec 16, 2004 #3
    the formula PE=KE?

    so the PE when the ball is below the peg has to equal the KE after it hits the peg?
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