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!

Rolling object and friction

  1. May 24, 2008 #1
    [SOLVED] Rolling object and friction

    1. The problem statement, all variables and given/known data

    I want to find an expression for the coefficient of friction when this object starts to skid when we pull it with a force F


    3. The attempt at a solution

    Ff = (mju)*Mg

    I found that I can put this into Newton's 2. law for rotation and solve for alpha = 0. But why can't I put it into newton's 2. law for linear motion and solve for alpha = 0 (a = (alpha)*R)?
  2. jcsd
  3. May 24, 2008 #2

    Doc Al

    User Avatar

    Staff: Mentor

    You can certainly apply Newton's 2nd law for translational motion. But "a = (alpha)*R" only applies when it rolls without slipping, which is not the case here.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Rolling object and friction
  1. Rolling friction (Replies: 1)

  2. Friction and Rolling (Replies: 10)

  3. Friction and Rolling (Replies: 3)