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!

Newton's Forces - Friction

  1. Oct 17, 2007 #1
    1. The problem statement, all variables and given/known data

    What are the minimum and maximum values of m1 in the figure to keep the system from accelerating? Take µs = µk = 0.42.


    ________ kg < (or equal to) m1 < (or equal to) ________ kg

    2. Relevant equations

    F = m(a)

    3. The attempt at a solution



    Does Ff equal 49 since Fg of mass 2=49 and thus Ft must equal 49 so mass 2 doesn't move and then that means the Ft on the mass 1 also equals 49 so Ff must also equal 49??


    I get m=13.75 which is wrong. :(
  2. jcsd
  3. Oct 17, 2007 #2
    You didn't write the net force along the diagonal direction. If you did, you'd notice that something was missing.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Newton's Forces - Friction
  1. Forces and Newton's Laws (Replies: 11)