1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Free body diagrams and Newton's Law

  1. May 1, 2015 #1
    1. The problem statement, all variables and given/known data
    2 masses, m1 and m2 are connected by a cord and placed on a frictionless table as
    shown in the diagram below. m1 slides on the frictionless table while m2 is hanging from a light frictionless pulley.
    What would be the mass of the hanging mass m2 if we know that the tension in the cord is T and the mass of the sliding mass is m1


    3. The attempt at a solution
    I drew a free body diagram for the system as a whole then I got that resultant force on the whole system is F=mg since it is only the weight of the two blocks. I don't really know how to go on from there.
  2. jcsd
  3. May 1, 2015 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    It's generally better to consider a separate FBD for each body.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Threads - Free body diagrams Date
Modified Block Problem -- Block on top and on the side Dec 28, 2017
Finding the magnitude of the force Oct 4, 2017
Mechanics: Free body diagram Sep 7, 2017