Homework Help: physics

Posted by Savannah on Saturday, September 3, 2011 at 1:29pm.

The figure below 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 v = 4.1 m/s, are each d = 0.30 m in depth, and are separated by L = 1.75 m. The arrangement in the figure occurs at time t = 0.

(a) At what average rate the layer of people at the door increase?

(b) At what time does the layer's depth reach 4.1 m?

physics - bobpursley, Saturday, September 3, 2011 at 2:19pm
a person gets to the door each 1.75/4.1 seconds. So depth increases .3m each time.

rate=.3/(1.75/4.1) m/s

Answer this Question

Related Questions

physics - Panic escape. The figure below shows a general situation in which a ...
Socials - compare figure 3-1, a map of France's physical features, with ...
Physics - Water at room temperature flows with a constant speed of 8 m/s through...
History!!! Help me!! Thank you!! - 1. Find a line that shows that Mr. Covey did...
physics - A fireman d = 39.0 m away from a burning building directs a stream of ...
Physics - Water (η = 1.00E-3 Pa*s) is flowing through a horizontal pipe...
physics - Two identical metal plates with small holes are aligned a distance L=7...
Physics - Two identical metal plates with small holes are aligned a distance L=7...
Physics HELP!!! Potentials and Fields - Two identical metal plates with small ...
GEOMENTRY - Alex wants to construct a line segment through R that makes the same...

For Further Reading

First Name:
School Subject:
Answer: