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!

Pulley question(newtons third law)

  1. Oct 2, 2008 #1
    1. The problem statement, all variables and given/known data

    there is a pulley and on one side theres a man hanging on it he weights 60kg on the other side resting on the ground is a 100kg weight. what is the tension on the rope

    2. Relevant equations

    T-m1g=m1a
    T-m2g=m2a
    F=2T-(m1+m2)g

    3. The attempt at a solution

    T-m1g=m1a T-m2g=m2a
    T=m1a+m1g T=m2a+m2g
    m1a+m1g=m2a+m2g

    then i pulled in the numbers and got
    g=a which = 9.8 (gravity)

    and now im stuck.. i think i might have done somethign wrong can someone help?
     
  2. jcsd
  3. Oct 3, 2008 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi Jennifer001! Welcome to PF! :smile:

    Hint: the man is hanging … stationary … so a = 0. :wink:

    Try again! :smile:
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Pulley question(newtons third law)
Loading...