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Homework Help: Vertical velocity

  1. Oct 2, 2011 #1
    (Q) If a diver (standing on a 15 meter high diving board) dives horizontally from the board, and mass is 50 kg. What is his vertical velocity 10 meters from the board ?

    PE @ 15m = mgh = 7358j (max)

    PE @ 10m = mgh = 4905j

    KE @ 10m = 7358 - 4905 = 2453j

    KE = 1/2 mv(sqr)

    2453= 0.5 x 50 kg v(sqr)

    v= 9.91 m/s ... but this is wrong and I cant think of what I have done wrong.... any ideas...
  2. jcsd
  3. Oct 2, 2011 #2


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    It's 10 metres from the board, not 10 metres above the water. So your second height is just wrong.
  4. Oct 2, 2011 #3
    Ohhh thankyou... lol... (always read the question twice and double check you understand it lol)....
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