Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Rotating bar, each end different velocities

  1. Apr 23, 2010 #1
    1. The problem statement, all variables and given/known data
    Simple question, but no matter how much I think about it I can't see what I'm doing wrong.

    2. Relevant equations

    3. The attempt at a solution
    Basically you have a bar where one side is moving at v1 and the other is moving v2, both in the same direction. So the whole system is moving, and then the bar is also rotating. I thought it would be moving at v1 as a system, and then rotating with a tangential velocity of v2-v1 since v2 > v1. What am I missing?
    Last edited by a moderator: Apr 25, 2017
  2. jcsd
  3. Apr 23, 2010 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Find the speed of each end with respect to the center of mass.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook