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: ENGR MECHANICS STATICS PROBLEM (summation of forces)

  1. Jan 29, 2008 #1
    1. The problem statement, all variables and given/known data
    The problem is the following;
    Three smooth homogeneous cylinders A, B, and C are stacked in a V-shaped trough. Each cylinder has a diameter of 500 mm and a mass of 100kg. Determine the forces exerted on cylinder A by the inclined surfaces.

    2. Relevant equations
    This problem requires you to sum the forces in the X and the Y direction and solve for the 2 normal forces. my problem is that I end up with an equation with 3 variables. A diagram drawn on paint is attached.

    3. The attempt at a solution
    I first tried to draw a FDB of cylinder A exclusively (Fb, Fc, N1 & N2) but ended up with an equation with 3 variables
    0.366Fb - 1.366 Fc +1.366N1=981N (my N1 is on the left side of cylinder A. N2 cancelled out).
    Then I tried to study cyl. B to later equal the forces but got 0=-566.38 so I gave up that route.
    A problem with the way I tried to solve this problem is that I didnt take into consideration the diameter at all.

    How would you go on solving this problem. btw the answers are N1=1304 N, N2=829 N

    Attached Files:

  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted