1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Angular motion problem question

  1. Nov 20, 2015 #1
    1. The problem statement, all variables and given/known data
    A homogeneous cylinder of mass 1.20 kg and diameter 25 cm rolls down an inclined plane that makes an angle of 25 degrees with the horizontal. What is the speed of the axis of the cylinder by the time the cylinder has rolled 1.00 m down the plane?

    2. Relevant equations

    3. The attempt at a solution
    So what I did was I first converted the diameter into meters. Then I divided that by 2 to give the the radius. I calculated it's moment of inertia of the cylinder, which is "1/2MR^2". I'm stuck after that.
  2. jcsd
  3. Nov 20, 2015 #2
    Use conservation of energy.
    1. Draw a diagram showing the situation at the beginning of the motion and at the end.
    2. Write down the types of energy that the object has in each situation
    3. Equate the total mechanical energy at the top to that at the bottom
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted