No clue, any hints

  • #1
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http://home.earthlink.net/~urban-xrisis/phyyy002.jpg [Broken]

I'm really not sure what to do here. ANY hints would be helpful.
 
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Answers and Replies

  • #2
Doc Al
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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.
 
  • #3
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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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