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\centerline{\bf PH 429: Reference Frames}
%\centerline{\bf Worksheet \worksheetnumber}
%\centerline{\it Due \duedate}
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\centerline{\bf Rocket from the North Pole}
\bigskip

Use an inflated balloon or inflatable globe to represent the surface of the Earth (which is
rotating at constant angular velocity).  A rocket is shot from the North Pole.
Assume there is no air resistance, and no left/right boosters on the rocket.
\begin{itemize}
\item Draw a point X on the equator.
\item Have one person rotate the globe at a constant angular velocity.
\item Have a second person draw the trajectory of the rocket as it is shot from the North Pole, initially aiming to fly over the heads of point X on the equator.
\end{itemize}

\begin{enumerate}
\item In the Earth's reference frame, the trajectory can be described by a Coriolis
force.  What direction does this force point?
\vfill

\item Continue the trajectory southward. What direction does the Coriolis force point?
\vfill

\item Will the rocket fly over the South Pole?
\vfill

\newpage

\item Is there a Coriolis force as the rocket passes the equator? How do you know?
\vfill


\item Write 2-3 clear, coherent sentences about what you learned in this activity that you would like to remember in the future. Make your statement using good scientific writing, as you would in a research paper.
\end{enumerate}


\vfill
\leftline{\it by Tevian Dray}
\leftline{Revised 2013 by Mary Bridget Kustusch}
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