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Homework Help: Hammer Free Falling 1 story ?

  1. Sep 2, 2010 #1
    1. The problem statement, all variables and given/known data
    OK... Hammer falls from building and after 1 second has fallen 1 story...
    How FAR has it fallen after 2 seconds?






    2. Relevant equations
    d= s x t


    3. The attempt at a solution
    So, doesn't that mean the Average Speed for 1 sec is 1 story/sec?
    How do I calculate the "Instant" speed at the 1 second mark?

    Also I am wondering
    how to fiqure the Accelereation in "Stories per Second"

    I keep coming up with the acceleration is 1 Story per second/second.

    I keep getting confused.

    Thanks
     
  2. jcsd
  3. Sep 2, 2010 #2

    rock.freak667

    User Avatar
    Homework Helper

    The hammer is under the influence of gravity only.

    x=ut+0.5at2

    Use the initial information to get the initual velcoity 'u'.
     
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