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Conservation of energy of an ice flake

  1. Mar 24, 2009 #1
    1. The problem statement, all variables and given/known data

    A 1.90 g ice flake is released from the ege of a hemispherical bwon whose radius r is 28.0 cm. The flake bowl contact is frictionless. What is the speed of the flake when it reaches the bottom of the bowl.

    2. Relevant equations
    I took KINETIC ENERGY = GRAVITATIONAL POTENTION ENERGY. since KINETIC ENERGY = .5*M*V^2, and GRAVITATIONAL POTENTIAL ENERGY = MGH, i canclled the masses and solved for V. That gave me VELOCITY = SQUARE ROOT OF (2*G*R).


    3. The attempt at a solution
    I got 23.44 for my answer but after looking over my calculations I noticed that the radius is given in cm. Need I convert it to meters? If I do my answer comes out as 2.344 m/s. Is this correct now?
     
  2. jcsd
  3. Mar 24, 2009 #2
    Nevermind. It is correct.
     
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