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: Rope over slope forces

  1. Aug 5, 2007 #1
    1. The problem statement, all variables and given/known data

    http://server7.pictiger.com/img/480530/other/forces.png [Broken]

    http://server7.pictiger.com/img/480530/other/forces.png [Broken]

    I would like to know the forces applied on the quadrant block as shown in the pic. Is there an equivalent force I can take for the whole quad? The block is fixed and allows the rope to slide freely. T1 and T2 (rope tensions) are different due to belt friction, but system is in static equilibrium.

    I think there is an equivalent force that acts at the centre of the quad. I need this force to calculate reaction force on welded block. I'm not sure about this though.
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Aug 5, 2007 #2


    User Avatar
    Homework Helper

    The "equivalent" force is the vector T1 + T2, and it must pass through the intersection of T1 and T2.
  4. Aug 5, 2007 #3
    update needs checking


    Is the following correct? Please refer to image link.

    Vertical : N*cos(A1) + W = R2
    Horizontal: N*sin(a1) = R1

    T1 and T2 are taken into account by N.
  5. Aug 13, 2007 #4
    bumpity bump
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook