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!

About newton's law

  1. Nov 20, 2007 #1
    please write down the three newton's laws of motion in both translation and angular forms, including their "equivalent" expressions of newton's second law. what are the assumptions for their application in classic mechanics? are those "equivalent" forms really equivalent? why?

    this is from my mid-term. i don't know how to answer this though it seems simple. in fact, i don't really understand what the question is about. especially the ""equivalent" part.
    can anyone please help me with it? Thank you.
  2. jcsd
  3. Nov 20, 2007 #2


    User Avatar
    Homework Helper

    I think they mean that they want you to explain why there is an angular "equivalent" of

    which looks like

  4. Nov 21, 2007 #3
    theirs also
    [tex] I = F \Delta t [/tex]

    in relation to momentum and

    [tex] E_k = \frac{1}{2}mv^2 [/tex]

    as it derives from F = ma, so it would be 2nd law in terms of energy.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: About newton's law