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====== Galilean Spacetime Diagrams ======

===== Prompts =====

** "Draw a diagram representing yourself, standing still." **

** "Draw a diagram representing your partner, moving right at 5 mph." **

** "Draw diagrams representing each of you throwing a ball to the right at 10 mph." **

===== Context =====

//Estimated Time: 20 minutes, including wrap-up//

This [[strategy:smallwhiteboard:|SWBQ]] is a good introduction to spacetime
diagrams.  Students represent motion as worldlines in a spacetime diagram.

===== Wrap Up =====

  * Ask several students to present/defend their responses.
  * Ask how fast each observer sees each thrown ball move.
  * Ask students to explain how to answer this question from the diagram.
  * Conclude that speed is (reciprocal) slope.

{{rfgalilean.ppt|Powerpoint slide}}
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{{rfgalilean.pdf|PDF slide}}

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