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!

Help on moment of inertia

  1. Nov 19, 2004 #1
    I need help on a problem, I tried using many equations, what do I do?...

    A m1=13.5kg object and a m2=12.5kg object are suspended, joined by a cord that passes over a pulley with a radius of 10 cm and a mass of 3 kg. The cord has a negligible mass and does not slip on the pulley. The pulley rotates on its axis without friction. The objects start from rest 3 m apart. Treating the pulley as a uniform disk, determine the speeds of the two objects as they pass each other.

    I used the equation to find acceleration...

    a=((m1-m2)g)/(m1+m2+.5mR^2) The .5mR^2 is the moment of Inertia

    After I found the acceleration I found the velocity...


    Please Help
  2. jcsd
  3. Nov 19, 2004 #2
    My first thought:
    Use conservation of energy to work for you
    Here the kinetic energy of both masses + potential energy of both masses + rotational energy of the pulley is conserved.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Help on moment of inertia
  1. Moment of inertia help. (Replies: 28)