Faster sampling emphasizes the movement of clothes, etc. Slower sampling rates can give a noticeable delay as students make sudden changes. The difference between walking away slowly and walking away more quickly is that the line slopes up more steeply the quicker you walk. Prediction Figure II- 2 is a distance graph of walking away from the detector slowly and steadily, stopping for about 4 seconds and then walking quickly toward it. The motions in the previous graphs are combined in one graph.
Answer depends on the individual student response.
Activity 2 Matching a Distance Graph Storage of data in Data B for comparison to that in Data A is a feature of the software which will be used frequently. The graph associated with Data B can be hidden without losing the data. Figure II-6 shows an attempt to match the graph. Students should be encouraged to try as many times as are necessary to get a good match. The match need not be perfect but only good enough to indicate understanding.