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!

Pulley question

  1. Oct 12, 2006 #1
    http://img135.imageshack.us/img135/3314/yeaheg1.th.png [Broken]

    I was wondering if someone could clarify this for me.
    (this system of accelerating, the block on the right is heavier)
    I know that Fnetx = T.

    However, I'm a little confused about why Fnety should be Fw - T as opposed to T - Fw

    When I was doing the free body diagram, for the y coord: T points up and Fw points down, so I was thinking since the standard coord system has up as +y and down as -y then Fnety = T - Fw, unfortunately it seems that it's necessary to reverse that.
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Oct 12, 2006 #2
    probably reversed so that acceleration comes out as a positive value for both blocks.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Pulley question Date
Help with this pulley question please Jun 26, 2017
Boatswans Chair pulley Question Apr 16, 2017
Pulley Question Jan 16, 2017
Pulley Question Jan 16, 2017