PHY 101 Logger Pro Instructions NOTE: Special Instructions for Lab 5 are at the bottom of this page. Thanks, GBA. Step 1: Be sure that your Logger Pro controller files and your motion videos for the week's lab are in the same folder. Double-click the appropriate Logger Pro controller file for the Part of the Lab which you are ready to analyze. The video will open within Logger Pro after about 30 seconds. Step 2: After first simply watching the video (and rewinding), then set the scale. This is the 4th button in the upper right. Click and drag from one end of the meter stick or ruler in the video to the other end; you will see a green line as you drag. At the end of dragging, you will see a confirmation box; confirm the distance as being the length of the meter stick or ruler in the video. Step 3: Set the origin for the video analysis program. The is the 3rd button in the upper right. Sometimes the best location of the origin will be indicated for you on the video screen; at other times it may be better to let the video run for a very short time before setting the origin. Once the origin is set, and shown with intersecting perpendicular yellow lines, you will probably wish to hide those lines; this is done with the 2nd-lowest button in the upper right. Step 4: Select the points for your analysis. This is the 2nd button in the upper right. Start by clicking on your selected origin. The video will automatically advance by a pre-set time interval. Click on the tracking mark after each advance until you reach the end of the videoed motion. Step 5: Your recorded times and positions will now appear on the left-hand side of your Logger Pro screen. If you chose to let the video advance a little before setting the origin, then your first listed time may not be zero; in such a case, it should be easy to subtract one time interval from each recorded time when you write your data into the proper locations in your Lab Manual pages for this Lab. Step 6: If you have several different Logger Pro controller files, then be sure to close the open instance of Logger Pro BEFORE opening the next Logger Pro controller file. When you close the Logger Pro controller file, be sure to click No when asked if you wish to "save your changes". If you must analyze several videos with only one Logger Pro controller file, then here are the instructions for opening the next video: Under Options, select Movie Options, then Browse. Double-click the next movie you wish to open, then click OK. After the new movie loads (it will take about 30 seconds), then under Data, select Clear All Data. You are now ready to go through Steps 1-5 above to analyze the new movie. Special Instructions for Lab 5: 1. Make the video display of Logger Pro as large as is possible on your screen. 2. Set the scale using the meter stick on top of the pendulum apparatus in the opening frame. 3. The origin must be set at the location of the pendulum when it is hanging straight down; use the opening frame. Leave the yellow lines on the screen. 4. Watch the video, then rewind to the beginning. Advance the video to some time not long after the pendulum has first been released, but not too close to the highest point of the swing (i.e. the point of release). At this initial location, start selecting points for your analysis. Select about 25 points. 5. Now your objective is to measure the distance between EVERY OTHER POINT, starting from some selected point near the beginning of your set of points. Use the fifth button from the top in the menu of LP buttons at the upper right. When you put your cursor over that fifth button, you should see the message "Photo Distance". These are the d_i values in Data Table 5.1. 6. For each measurement of distance, there is now a point near the midpoint of the measured distance. Your next task is to measure the altitude of these "midpoints", as measured from h=0 at the horizontal yellow line on your screen. Use the Photo Distance LP button, and make sure that there are no "kinks" in your measurement line (this will assure you that you are correctly measuring a vertical distance). These measurements are the h_i values in Data Table 5.1.