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Homework Help: Dynamics Problem

  1. Dec 12, 2006 #1
    1. The problem statement, all variables and given/known data
    Please see attachment below

    2. Relevant equations

    3. The attempt at a solution

    Attached Files:

  2. jcsd
  3. Dec 19, 2006 #2


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    You are given the values of [itex]r,~\theta,~\dot{r},~\dot{ \theta }, ~\ddot{r},~\ddot{ \theta } [/itex]. (note: one of these numbers is zero)

    You are then asked to find velocities, accelrations, etc.

    You know that [tex]\vec{v} = \frac {d}{dt} \vec{r} = \frac {d}{dt} (r \hat{r} ) = \dot{r} \hat{r} + r \dot{ \theta } \hat{ \theta } ~~[/tex] and [tex]~~\vec{a} = \dot{ \vec{v}} ~~[/tex] etc. Just find the derivatives and plug in numbers.
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