• Move the cursor over the movie window area.

The cursor should look like this , and the bottom right of the movie window should have the italicized text "Point s1." This is the first video point to be located by you in the frame that currently appears in the movie window.
Note: Cursors in the Movie Window
If the cursor looks like: , clicking on the movie window will locate the video point that is currently selected.

If the cursor looks like , you can select a previously located video point and use a drag and drop technique to move it to another location.

  • Move the cursor so that the ball being launched out of the projectile launcher is centered in the cursor.
  • Click once to locate this video point.

The movie will automatically advance to the next frame.

  • Continue clicking on the location of the ball in each frame until you reach the last frame of the movie.
You have now collected data for this movie. However, the data are still in terms of pixels since you have not yet scaled the movie.

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