Phys 1 Student Workbook.pdf

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Physics Labs with Computers, Vol. 1Student WorkbookP23: Conservation of Angular Momentum 012-07000AUse the Rotary Motion Sensor to measure the angular speed of a rotating disk before and after asecond disk that is not rotating is dropped onto the rotating disk. Use DataStudio orScienceWorkshop to record and display the angular speed before and after the torque-freecollision.PART I: Computer Setup1. Connect the ScienceWorkshop interface to thecomputer, turn on the interface, and turn on thecomputer.2. Connect the Rotary Motion Sensor’s stereophone plugs into Digital Channels 1 and 2 on theinterface. Remove the ‘O’ ring from the largegroove on the step pulley on the sensor.3. Open the file titled as shown:500 scientificPASCOInterfacescientific300PASCOANALOG CHANNELSScienceW orkshop DATA LOGGING INSTRUCTIONSScienceWorkshopInterfaceDataStudio ScienceWorkshop (Mac) ScienceWorkshop (Win)P23 Angular Momentum.DS (See end of activity) (See end of activity)• The DataStudio file has a Workbook display and a Graph display. Read the instructions inthe workbook.• Data recording is set at 20 Hz. The Rotary Motion Sensor is set for 360 divisions perrotation.• See the pages at the end of this activity for information about modifying aScienceWorkshop file.PART II: Sensor Calibration and Equipment Setup• You do not need to calibrate the sensor.1. Mount the Rotary Motion Sensor on a support rod so the step pulley is on top.2. Remove the thumbscrew from the step pulley on top of the Rotary Motion Sensor. Placethe disk on the pulley and attach the disk with the thumbscrew.p. 162 ©1999 PASCO scientific P23
Name _____________________ Class ______________ Date _________PART III: Data Recording• In this part of the activity you will drop the second disk onto the disk that is attached to theRotary Motion Sensor. Hold the second disk so the square indent on one side of the disk isabove the thumbscrew on the first disk.1. Give the first disk a spin using your hand.2. Start recording data. (Hint: Click ‘Start’ in DataStudio or ‘REC’ in ScienceWorkshop.)3. After about 25 data points have been recorded, drop the second disk onto the spinning one.4. After another 25 or so data points have been recorded, stop data recording.• Run #1 will appear in the Data list.5. Repeat the data recording procedure a total of three times.P23 ©1999 PASCO scientific p. 163
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Phys 1 Student Workbook.pdf

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