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Bashyboy
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Homework Statement
Figure 2-21 shows a general situation
in which a stream of people attempt to escape through an exit door
that turns out to be locked. The people move toward the door at
speed vs 3.50 m/s, are each d 0.25 m in depth, and are separated
by L 1.75 m.The arrangement in Fig. 2-21 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 5.0 m? (The answers
reveal how quickly such a situation becomes dangerous.)
Homework Equations
The Attempt at a Solution
I am not certain how to solve this.