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Kinetic Energy rotational motion problem, help please

  1. Dec 4, 2008 #1
    Kinetic Energy rotational motion problem, help please!!

    1. The problem statement, all variables and given/known data

    A 2.4 kg cylinder (radius = 0.11 m, length = 0.50 m) is released from rest at the top of a ramp and allowed to roll without slipping. The ramp is 0.62 m high and 5.0 m long.

    (a) When the cylinder reaches the bottom of the ramp, what is its total kinetic energy?
    (b) What is its rotational kinetic energy?
    (c) What is its translational kinetic energy?

    2. Relevant equations

    klinear = 1/2mv^2
    krotation = 1/2Iw^2

    3. The attempt at a solution

    tried plugging in 2.4 for mass but have no clue how to get the speed, when its not given.
     
  2. jcsd
  3. Dec 4, 2008 #2

    Hootenanny

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    Re: Kinetic Energy rotational motion problem, help please!!

    HINT: Something is conserved.
     
  4. Dec 4, 2008 #3
    Re: Kinetic Energy rotational motion problem, help please!!

    ummm that really doesn't help me..
     
  5. Dec 4, 2008 #4

    Hootenanny

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    Re: Kinetic Energy rotational motion problem, help please!!

    Which quantity do you think is conserved?
     
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