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!

Rotational motion, find the frictional force.

  1. Sep 20, 2015 #1
    1. The problem statement, all variables and given/known data
    A small 350-g collar C can slide on a semicircular rod which is made to rotate about the vertical AB at a constant rate of 7.5 rad/s. The coefficients of friction are μs = 0.25 and μk = 0.20.
    13252702377533245599.png

    2. Relevant equations
    Tangent Velocity= Radians*radius
    Normal acceleration an= Vt^2/radius

    3. The attempt at a solution
    20150920_210516_2.jpg
     
  2. jcsd
  3. Sep 20, 2015 #2
    Basically the collar has two forces acting on it. The rotational force and the gravitational force. I used the y axis for the force components parallel/opposite to the normal force and multiplied the normal force by the kinetic friction which should have given me the frictional force. But the computer program I'm using (Mcgraw hill) says my answer is wrong.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Rotational motion, find the frictional force.
  1. Find the force (Replies: 7)

Loading...