- #1
madah12
- 326
- 1
Homework Statement
[PLAIN]http://img443.imageshack.us/img443/3598/physicsproblem.pngHomework Equations
Ok so I am first of I don't know when they said layer if they meant the number of people or the thickness? of the people I don't understand the question
The Attempt at a Solution
what I noticed is that at first the first guy will have to cross L distance but the second guy must cross (L-d) but then it get so complicated I mean how can I solve this? what I noticed is that for all 1 seconds they cross L distances so at the first 1/2 second the first guy will be at the door but then the second guy will be at his place but he will have to cross 1.5 m not 1.75 which will take him .42 seconds but that won't matter for the ones before him right? they will still have to cross .5 seconds to reach the before last place pfff it's too complicated to me that I can't even describe it rather than solve it
ok so what I can make out is that they move L distance for all .5 seconds
and if I call the door is where x = 0 and the left side is positive
then when they reach x=L they must cross (L-nd) distance while the first guy is where n = 0 .but that is not useful at all at finding how the layers increases... but I tried lol
EDIT: I know this is stupid but is the book assuming the people are transperant because it would be easier if they can go through each other
Last edited by a moderator: