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 and force

  1. Dec 17, 2003 #1
    as you all now torque in rotational motion has similarity with force in translational motion. but torque has the same unit as energy.it seems to me that there is a problem. Any explanation you have? (please ssmt different than " they are defined that way!!"
    Last edited: Dec 17, 2003
  2. jcsd
  3. Dec 17, 2003 #2


    User Avatar
    Science Advisor

    In translational motion, work done (energy) is

    [tex]E=\int Fdx[/tex]

    In the same manner, in rotational motion,

    [tex]E=\int\tau d\theta[/tex]

    Since [tex]\inline{\theta}[/tex] is dimensionless, torque [tex]\inline{\tau}[/tex] has same units as energy. If it helps in keeping things apart, you can think of the units of torque as being say joules per radian.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Torque and force
  1. Torque equals force? (Replies: 4)

  2. Torque and force (Replies: 12)