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Help on this accelerated motion problem please

  1. Oct 29, 2009 #1
    1. The problem statement, all variables and given/known data

    A stone is dropped from the roof of a high building. A second stone is dropped 1.31 s later. How far apart are the stones when the second stone has reached a speed of 19.3 m/s?

    2. Relevant equations

    well...

    stone 1
    V0 = 0m/s
    vf = unknown
    t = unknown
    a = -9.8m/s/s
    x = trying to find

    stone 2
    V0 = 0m/s
    vf = 19.3m/s
    t = unknown
    a = -9.8m/s/s
    x = trying to find

    3. The attempt at a solution

    That's all I know.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Oct 29, 2009 #2

    rl.bhat

    User Avatar
    Homework Helper

    For stone two, find t to reach the velocity 19.3 m/s.
    Using the kinematic equation, find the displacement of stone 2.
    Find the displacement of stone i in time ( t+1.31s )
     
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