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: Help with physics impulse problem

  1. Aug 13, 2005 #1
    I just need a little help getting past the first step. I have already converted rpm to rad/sec.

    120 J are done on a fly wheel to raise its speed from 60rpm to 160 rpm. Find its moment of inertia.


    How do I convert 120J to power

    and how do I set up the inertia half
     
  2. jcsd
  3. Aug 13, 2005 #2
    Think in terms of angular kinetic energy.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook