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!

Torque from a frame of reference

  1. Feb 4, 2016 #1
    Whenever we define torque from a frame of reference, is it necessary for the frame to be inertial?
    Please explain because I am unclear on this.
  2. jcsd
  3. Feb 4, 2016 #2


    User Avatar
    Science Advisor
    Homework Helper
    2017 Award

    Yes. In e.g. an accelerating frame of reference you no longer have ##\vec \tau = I\vec\alpha##.
    Example: you sit in an accelerating car and have to lean forward to stay sitting upright. ##\alpha## of your head w.r.t. your hips is zero but you (or the backrest) do have to exercise a torque to stay with your head above your hips.
  4. Feb 4, 2016 #3
    In case of non inertial frame, a pseudo force should be taken and then we can proceed writing the torque. Right?
    Last edited: Feb 4, 2016
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook