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Homework Help: Kinetic and potetnial energy in a circle?

  1. Oct 9, 2011 #1
    1. The problem statement, all variables and given/known data
    The drawing below shows a person who, starting from rest at the top of a cliff, swings down at the end of a rope, releases it, and falls into the water below. There are two paths by which the person can enter the water. Suppose he enters the water at a speed of 10.0 m/s via path 1. How fast is he moving on path 2 when he releases the rope at a height of 3.80 m above the water? Ignore the effects of air resistance.


    2. Relevant equations
    KEf+PEf=KEo+PEo
    KE=1/2mv^2
    PE=mgh
    3. The attempt at a solution
    KEf=KEo+PEo-PEf
    Vf=sqr(2((.5*Vo)+(9.8*10)-(9.8*3.8)))
    Vf=13.7m/s
     
  2. jcsd
  3. Oct 9, 2011 #2
    Where is picture?
     
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