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 getting started - just advice, no answers please!

  1. Apr 17, 2010 #1
    1. The problem statement, all variables and given/known data
    The 9 N cradle is supported as shown by two uniform disks that roll without slipping at all surfaces of contact. The weight of each disk is w=6 N and the radius of each disk is r=10 cm. knowing that the system is initially at rest, determine the largest velocity Vc of the cradle, for the three cases shown below, after it has moved 45 cm.

    [PLAIN]http://www.pimpmyshu.com/images/stories/dyn1.jpg [Broken]


    I'm having trouble getting started with this question so I was hoping for some advice on what areas to look into that would help with this question and where I could find relevant equations etc that I could use to solve it.
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Apr 18, 2010 #2
    A starting point is F=ma. Then consider that you have other information given. What principle could make use of that information?
     
  4. Apr 19, 2010 #3
    f=ma as pongo mentioned
    probably start with a free body diagram which identifies the forces on the body u r interested in.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook