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: Tension Force

  1. Oct 16, 2007 #1
    1. The problem statement, all variables and given/known data
    The diagram below shows two people having a tug-of-war. Determine the unknown tension force if person A is winning.

    http://img80.imageshack.us/img80/8286/forcefp2.gif [Broken]​

    2. Relevant equations
    None that I think are necessary.

    3. The attempt at a solution
    I think that the unkown tension for person B would be 900 N, because tension is constant throughout the entire rope.
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Oct 16, 2007 #2


    User Avatar
    Homework Helper

    You're right if the rope is massless... do they give a mass for the rope?
  4. Oct 16, 2007 #3


    User Avatar
    Science Advisor

    How about Fnet = ma?

    Typically, since the mass of the rope is negligible compared to the rest of the system we assume it to be massless. If so, then the tension throughout the rope is indeed the same (of course if it has mass and is not accelerating then you get the same result as well).

    In this case, since A is winning, the rope would be accelerating (unless A is winning at a constant velocity!). However, since the rope is assumed massless then the tension is the same throughout as previously stated.
    Last edited: Oct 16, 2007
  5. Oct 19, 2007 #4
    No, they don't give a mass for the rope. Thanks for the help though guys.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook