Homework Help: Bridge Project

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1. Feb 18, 2016

CGI

1. The problem statement, all variables and given/known data
Hi! I wasn't sure how to ask this, but my team and I are making a manila file folder bridge and we are stuck a specific part. We are looking to get the mass of the members and we decided to get it through multiplying the volume of the member by the density of manila file folder. The only problem is, we do not know the density of manila file folder.

2. Relevant equations
p = m/V
V = Width*length*thickness
3. The attempt at a solution
I've spent all day searching for the density, but I have been unsuccessful. I thought that maybe someone here would happen to know where to look or knew the density. All leads are very much appreciated!

2. Feb 18, 2016

SteamKing

Staff Emeritus
Probably the best way to solve this is to take a known area of manila folder and find its mass. You can do trials using material cut from several different manila folders and calculate an area density for this material. You can certainly get a number for the density of manila folder material in way less time than spending a whole day stuck in research.

3. Feb 19, 2016

CWatters

If you don't have sensitive scales to weigh one folder try weighing a whole box full and then dividing by the total area to get the area density.