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Homework Help: Average velocity and average speed problem.

  1. Aug 30, 2008 #1
    1. The problem statement, all variables and given/known data
    The people move toward the door at a speed V s=3.50m/s,are each d=.25m in depth, and are separated by L=1.75 m. The arrangement in Fig.2=22 occurs at time t=0(a) at what average rate does the layer of people at the door increase? (b) at what time does the layer's depth reach 5.0m? (the answers reveal how quickly such a situation becomes dangerous.
    In the picture there are 3 people running towards a door

    v= change in x/ change in t
  2. jcsd
  3. Sep 1, 2008 #2


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    Hi afcwestwarrior! :smile:

    I suspect everyone's as confused as I am …

    are the 3 people running side-by-side or front-to-back?

    where is everyone else?
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