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Homework Help: Kinetic Energy

  1. Jan 7, 2008 #1
    1. The problem statement, all variables and given/known data

    A solid sphere of mass 1 kg that moves on a level surface at a speed of 20m/s. It then
    ascends am inclined surface with an angle of 30 degrees. Determine:

    a) the kinetic energy of the sphere when it is positioned at the base of the inclined surface.

    b) the distance covered on the inclined surface.

    2. Relevant equations

    What equation should be used here?

    3. The attempt at a solution

    I have no idea how to solve this problem.
  2. jcsd
  3. Jan 7, 2008 #2
    Your kinetic energy equation (KE=1/2*mv^2) and the potential energy equation (mgh)

    Assuming no friction on the incline, the HEIGHT it reaches would be the same if the incline were 70 degrees or 2 degrees or any angle. You then use the angle to see how much distance it covers on the incline
    Last edited: Jan 7, 2008
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