| Experimental Procedure | Pendulum - LCIII | Pendulum - LCII | Coffee Filters |

The cropped movie made with the LCII (Performa 400) was analyzed using *VideoPoint * and *VideoGraph.*

*VideoPoint*

Position is measured using *VideoPoint *, with the movie shown at twice its actual size (160x40 pixels).

The graph below shows a plot of position vs time in *VideoPoint *. The crosses are measured points; the solid line represents a mathematical model of the data.

*VideoGraph*

Position is measured using *VideoGraph *; in this example, acceleration has been plotted. While the movie runs, the circle on the graph moves correspondingly.

In the graph below, the same acceleration vs time plot has been smoothed by clicking twice on the button at the lower left.

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