1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Statics Problem istributed Loads

  1. Mar 8, 2013 #1
    Statics Problem:Distributed Loads

    http://imageshack.us/a/img845/5825/112639502.jpg [Broken]

    When measuring from the left side of the beam Xa,Xb ,Xc ,Xd ,Xe ,and Xf are the locations where the resultant force is applied in each of the six cases. Rank these six locations.

    Rank the items from smallest to largest. To rank items as equivalent, overlap them.

    For this problem, I just made the assumption the L was equal to 1 so I could work with real numbers.

    Xa and Xb I found to be the same locations as in 1/2 because they are rectangles.

    The centroid of a triangle is 1/3L from its peak, so Xc I said it was 1/3.

    Xd = 2/3 since the peak is on the right hand side this time.

    I don't know how to find the centroid of the last trapezoids. I just know that Xf > Xe and that they are somewhere in between L/3 and L/2 from a hint in my HW.

    The current ranking I have from SMALLEST to LARGEST is

    Xc, Xe, Xf, Xa, Xb (they are equal), and Xd but that is wrong. How do I solve this?
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
    Last edited by a moderator: May 6, 2017
  2. jcsd
  3. Mar 8, 2013 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    When the problem statement said rank the locations of the resultant, it appears it did not specify if they should be ranked from smallest to largest or vice versa.
  4. Mar 9, 2013 #3
    Sorry about that

    Rank the items from smallest to largest. To rank items as equivalent, overlap them.

    I shall also edit my post
  5. Feb 19, 2015 #4
    This probably doesn't help the person who originally answered the question but the answer is Xc, Xe, Xa, Xb (they are equal), Xf, and then Xd.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted