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Homework Help: Basic forces/friction

  1. Oct 11, 2004 #1
    Hello, I'm on my way to having a test on "Forces/Friction" very soon in the future, but the thing is Im stuck :( my teacher wont really help me out. He only states the answer doesn't show how to achieve it at all. So I was wondering if anyone could tell me some basic formulas, and examples that could help me out?

    Thanks John
  2. jcsd
  3. Oct 11, 2004 #2


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    Homework Helper

    All you need to learn for Linear Dynamics, also learn how to do Free Body diagrams.

    Newton's 1st Law

    [tex] \sum_{i=1}^{n} \vec{F}_{i} = 0 \rightarrow \vec{v} = constant [/tex]

    Newton's 2nd Law

    [tex] \sum_{i=1}^{n} \vec{F}_{i} = m \vec{a} [/tex]

    Newton's 3rd Law

    [tex] \vec{F}_{12} = -\vec{F}_{21} [/tex]

    Friction Force Magnitude

    [tex] F_{f} = \mu N [/tex]
  4. Oct 11, 2004 #3
    WOW same here..i am having a test on friction/forces very soon too! and i also got a teacher dat sucks!
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