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: More torque yay

  1. Jun 4, 2009 #1
    More torque yay!!!

    1. The problem statement, all variables and given/known data

    A horizontal bar with a mass m suspended from one end is held by a cord with tension T, fastened at a distance D from the end of the bar that is attached to a wall with a frictionless pin. What is the torque about the pin exerted on the bar by the cord?

    2. Relevant equations

    torque = rF

    3. The attempt at a solution

    My answer is DTsin(theta.

    Am I right or way off?
  2. jcsd
  3. Jun 4, 2009 #2


    User Avatar
    Homework Helper

    Re: More torque yay!!!

    Since they only want the torque from the cord, (you can ignore the mass of the bar and the torque generated from its weight), then your answer is OK.

    When the angle with the wall is zero or 180, there is no torque.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook