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!

What is Torque?

  1. Jul 8, 2006 #1
    Can anyone give me a 'simple' explanation of torque? And how is it measured? Or tell me best place to find this info?

    Thanks!
     
  2. jcsd
  3. Jul 8, 2006 #2

    arildno

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    Dearly Missed

    [tex]\vec{r}\times\vec{F}[/tex]
     
  4. Jul 8, 2006 #3
    lol. Thank you arildno! :-)

    Sadly that helps not one bit as I am not an engineering student, but I guess the thought was there! I am working my way through Wikipedia so sure I'll get there soon.
     
  5. Jul 8, 2006 #4

    Doc Al

    User Avatar

    Staff: Mentor

  6. Jul 8, 2006 #5

    arildno

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    Dearly Missed

    Okay, a bit more then:
    The torque a force produces upon an object with respect to some point is directly related to how strongly the object will rotate about the point.
     
  7. Jul 8, 2006 #6
    Thank you both. I think it's getting my head around the idea that "how strongly" the object rotates about the point is a combination of how "fast" and with how much "force". Wish I was a real scientist...
     
  8. Jul 9, 2006 #7
    Fast? Don't you mean distance?

    Actually there are lots of real-world examples you can think about to get the idea about torque. For instance, consider a door. Notice that the doorknob is always as far as possible from the hinge (which is the axis of rotation). What happens if the doorknob is very near to the hinge? Does it make it easier or more difficult to open or close the door?

    Direction of the force matters too. As someone mentioned, torque is the cross product of the displacement vector and force. What if both of these vectors are parallel? Work it out, then consider this: what if you apply a force to the door towards the hinge? Does it affect the rotation?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: What is Torque?
  1. Torque problem (Replies: 4)

  2. Torque of a Shaft (Replies: 3)

  3. Torque and Power (Replies: 7)

Loading...