1. Not finding help here? Sign up for a free 30min 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!

Torque and equilibrium problem

  1. Nov 2, 2008 #1
    1. The problem statement, all variables and given/known data
    for the 1m long, 5N beam below, find the balancing mass m and the supporting tension T

    T
    ----- ^
    | | | ------
    | m | |(25cm) | 2kg |
    ---------------------------------(1m)


    2. Relevant equations

    f=ma

    torque= Fxr
    cross product, F x rsinx



    3. The attempt at a solution

    first i summed the forces

    Fx=0, no forces acting in x.

    Fy=0

    forces acting

    1. m1g= 9.8m1
    2> m2g= 19.6N
    3. CG= 5n
    4. T =?

    9.8m1 + 19.6N + 5N - T= 0

    so T = 9.8m1 + 24.6N


    next I summed the torques

    19.6N * 0.75m + 5 * 0.25 -(9.8)(.25m)m1 = 0

    m1 = 6.5kg

    Fm1= 63.7N

    the actual answer of the force is -88.7N, and the T=8.45

    seeing how i have the wrong force values i know that my T will be wrong using it. if anyone can show me where I went wrong in this one that would be very helpful thanks.
     

    Attached Files:

  2. jcsd
  3. Nov 2, 2008 #2
    sorry about picture, i just uploaded a paint file so hopefuly that works.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Torque and equilibrium problem
Loading...