The rock falls from the cliff. What is its kinetic energy just before it strikes the ground?

February 12, 2005 3 Comments
rock
Pimp asked:




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Tags: , , Physics
3 Comments to “The rock falls from the cliff. What is its kinetic energy just before it strikes the ground?”
  1. Ben S says:

    The Kinetic energy at the bottom equals the Potential energy at the top.

    At the base of the cliff the PE=0

  2. doane_nut says:

    What does your text book say? These are all straight forward questions and should be in there.

  3. beppi says:

    a) Epot = m * h * g (g = 9.81 m/s^2)
    b) Ekin = Epot
    c) v = sqrt(2*h*g)

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