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Free falling can

  1. Jan 16, 2008 #1
    [SOLVED] free falling can

    1. The problem statement, all variables and given/known data
    A painter is standing on scaffolding that is raised at constant speed. As he travels upward he accidentally nudges a paint can off the scaffolding and it calls a distance of 14.3m to the ground. You are watching, and measure with your stopwatch that it takes a time of 3.24s for the can to reach the ground. Ignore air resistance
    a. What is the speed of the can just before it hits the ground?
    b. another painter is 3.8m above the point the pain can fell. If the paint can passes in front of him he will be able to catch it. Does he catch it?


    2. Relevant equations
    x=v0*t+.5*a*t^2
    prob other kenmatics equations


    3. The attempt at a solution
    the answer for final V is NOT 16.8 or -16.8
     
  2. jcsd
  3. Jan 16, 2008 #2

    Shooting Star

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    1. There is an eqn connecting initial and final velo and dist. Use that.
    2. You can find max height from initial velo. See whether the 2nd painter is below or above the height.
     
  4. Jan 16, 2008 #3
    yeah i know but the problem is the initial v is not given
    so i dont know where to go from there
     
  5. Jan 16, 2008 #4

    Shooting Star

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    But you have already written down the eqn for finding V0!
     
  6. Jan 16, 2008 #5
    ok wow i am not thinking...i feel rather retarded now
    thanks bunches!!!
     
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