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Kinematics problem

  1. Jun 9, 2016 #1
    1. The problem statement, all variables and given/known data
    Humpty Dumpty had a great fall from a roof. It took him 2.25s to fall. How high was the roof?

    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
  3. Jun 10, 2016 #2

    ehild

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    :welcome:

    The policy here is that you have to show your attempt at a solution. How does Humpty-Dumpty move? with constant velocity? Or does he accelerate?
     
  4. Jun 11, 2016 #3
    It seems like a case of free-fall.
    u=0,a=g and t is given
    Use the equation H=ut+1/2at2
    But this is what I presume.There isn't any clear information about the motion of Humpty Dumpty.
     
  5. Jun 11, 2016 #4
    Thanks, I got it.

    I used H=ut+1/2at2

    but it seemed I was inputting the wrong digit to the calculator
     
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