Experiment 03

MOTION - I

PROCEDURE

A. Distance-Time Graphs

To begin data taking, open the Motion-I link.  A Position vs. Time graph will appear in the LoggerPro window.

Graph 1: Walking slowly and steadily away from the detector

1.    Stand about 0.5 meter from the detector, have your partner click Collect, and walk away from the detector slowly and steadily. Practice this a few times until you can generate a relatively smooth graph.  Partners should alternate in performing the motions and controlling Collect-Stop in alternate graphing activities (7 in all).

2.    Copy the graph by selecting EDIT...COPY from the LoggerPro menu bar.

3.    Open the Motion-I Workbook and fill in the header information. Put the cursor in cell A10.

4.    Paste the copied graph into the Worksheet by selecting EDIT...PASTE from the menu bar.

5.    Resize the graph to make it fit within a box encompassing cells A10...E23 on the Worksheet.

NOTE: To do this, first select the graph by pointing and clicking once anywhere inside the outlined box containing the graph. "Handles" (small squares) will appear on the outline to indicate that it has been selected. Grab the lower right handle and, while holding down the shift key, move the pointer to resize the box as necessary. The entire box may be moved by clicking anywhere inside it and dragging the outlined image to the desired location.
 
6.    Answer Questions 1 through 3 on the Worksheet.
Graph 2: Walking medium fast and steadily away from the detector. 7.      Repeat the above procedure, but this time walk medium fast and steadily away from the detector.

8.    COPY and PASTE this graph into cells A27...E39 of the Worksheet.

9.    Answer Questions 4 through 7 on the Worksheet.
 

Graph 3: Walking slowly and steadily toward the detector 10.    Prepare a third graph by walking slowly and steadily toward the detector. In this case, start as far as you can from the detector and still get reliable results.

11.    COPY and PASTE this graph into cells A52...E64 on the Worksheet.

12.    Answer Questions 8 through 10 on the Worksheet.
 

Graph 4: Walking medium fast and steadily toward the detector 13.    Prepare a fourth graph by walking medium fast and steadily toward the detector.

14.    COPY and PASTE this graph into cells A68...E80 on the Worksheet.

15.    Answer Questions 11 through 14 on the Worksheet.

B. Making Predictions 1.    Predict the Position vs.Time graph that would result if you:
  start at the 1-meter mark

• walk away from the detector slowly and steadily for 4 seconds

• stop for 4 seconds

• walk quickly back to the detector
 
 

2.    Sketch your prediction on the blank graph provided for this section on the Worksheet.

To make the sketch:
 

First activate the drawing toolbar by clicking on the drawing tool icon  on the Menu Bar, then select the "Lines" drawing tool button from the toolbar palette: 

From the submenu, select the "Freehand" tool from the palette: 

Practice drawing by moving the pointer around while keeping the mouse depressed. When you release the mouse, your line will appear with "handles". If acceptable, click anywhere off the line. If not, delete the line by pressing the delete key while the line is selected (handles showing), reselect the "free-hand" drawing tool, and repeat.

 
NOTE: Straight line segments can be made with either the "line" button:    .... or with the "polygon" button: . If you use the polygon button and do not wish to make a closed figure, double click when you reach the end of your line. 3.    Compare your prediction with that of your lab partner. Discuss your predictions with each other and resolve any differences.

4.    Now do the experiment. Both you and your lab partner should move as described in step B.1 above. When you are satisfied that you have the motion right, set up the LoggerPro detector and collect the data for this graph. COPY and PASTE the LoggerPro graph into cells A110...E123 of the Worksheet.

5.    Answer Questions 15 on the Worksheet.

C. Matching a Position vs. Time Graph 1.    A specific graph Position vs.Time graph has been duplicated for you in Section C.1 of the Worksheet. Review this graph and decide on the motions necessary to make each segment.

2.    Click on the Distance.Match link.  To activate the Collect button again, under the EXPERIMENT menu select Connect Interface.

3.    Now move so that you duplicate the graph. Try a number of times until you match the graph as closely as possible. Everyone in the group should get a turn. Note the critical times and positions in the figure before you begin.

4.    When you are satisfied with the result, COPY and PASTE your resulting graph in cells A152..E164 of the Worksheet.

5.    Answer Questions 16 on the Worksheet.
 

D. Other Position vs. Time Graphs 1.    Remove the Distance.Match graph from the screen by selecting Delete Data Set...Latest from the LoggerPro DATA Menu.

2.    One partner should make up his/her own position vs. time graph using straight lines and no curves. Sketch the graph on the blank set of axes provided for this purpose in Section D of the Worksheet.

RECALL: The "drawing tools" icon  must be activated to use the drawing tools in Excel. Refer to the note in step B.2 above about using the "line" and "polygon" drawing tools. 3.    Now try to duplicate the graph through actual movement. After you are satisfied with the results, COPY and PASTE your LoggerPro result in cells A194..E209 of the Worksheet.

4.     When you have completed the Worksheet you can print out your results by selecting FILE....PRINT from the Menu, and use it for completing your lab report.