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: Pulley question

  1. Nov 1, 2008 #1
    1. The problem statement, all variables and given/known data

    Hey guys.
    Look at this pulley system, I wrote down all the equations.
    The pulley on the left is massless, the one on the right has the mass of m3 and radius R.
    I also wrote the the torque equation of the pulley and the thing I don't understand is the what is the acceleration of the pulley (a3), is it equal to a2 or to a1?
    Thanks a lot.

    2. Relevant equations

    3. The attempt at a solution

    Attached Files:

  2. jcsd
  3. Nov 1, 2008 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Aren't m2 and m3 (the pulley) attached?
  4. Nov 1, 2008 #3
    Oh, you right...:blushing:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook