Phys 1 Student Workbook.pdf

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Physics Labs with Computers, Vol. 1Student WorkbookP15: Simple Harmonic Oscillation 012-07000ASAFETY REMINDER• Follow the directions for using the equipment.Pre-Lab For You To DoIn the Pre-lab use the Force Sensor to measure the weight of a hanging mass. Use ‘KeyboardSampling’ to enter the displacement of the spring from equilibrium. Use DataStudio orScienceWorkshop to determine the spring constants k 1and k 2for the springs.Pre-Lab PART I: Computer Setup1. Connect the ScienceWorkshop interface to the computer,turn on the interface, and turn on the computer.2. Connect the DIN plug of the Force Sensor to AnalogChannel A.3. Open the document titled as shown:500 scientificPASCOInterfacescientific300PASCOANALOG CHANNELSScience W orkshop DATA LOGGING INSTRUCTIONSScienceWorkshopInterfaceDataStudio ScienceWorkshop (Mac) ScienceWorkshop (Win)P15 Prelab Oscillation.DS X21 Spring Constant X21_HARM.SWS• The DataStudio document has a Workbook display. Read the instructions in the Workbook.• The ScienceWorkshop document has a Graph display of Force versus Stretch and a Digitsdisplay of Force.• Data recording is set for 5 Hz. Keyboard Sampling allows the user to enter the distancestretched in meters.Pre-Lab PART II: Sensor Calibration and Equipment Setup• To calibrate the Force Sensor, refer to the description in the Force Sensor Manual.1. Put the five-pattern picket fence into the slots of the accessory tray on top of the DynamicsCart. Put the picket fence on the cart so the 2.5-centimeter opaque band is at the top.Five-patternpicket fenceEdge-to-edge spacing:1 cm or 2 cmBand lengths: 10 cm,5 cm, or 2.5 cm2. Measure the mass of the cart plus picket fence. Record the mass in the Data Table.3. Put the Adjustable Feet on both ends of the 1.2 meter Dynamics Track and place theDynamics Track on a horizontal surface. Put the cart near the middle of the DynamicsTrack and level the Dynamics Track by raising or lowering one end so the cart will not rollone way or the other.4. Put one end-stop at the right end of the Dynamics Track.5. Mount the Force Sensor horizontally on a support rod and base. Position the Force Sensorat the left end of the Dynamics Track so the hook is even with the end of the DynamicsTrack and is at the same height as the top of the end-stop that is at the right end of theDynamics Track.p. 98 ©1999 PASCO scientific P15
Name _____________________ Class ______________ Date _________6. Connect springs to both ends of the Dynamics Cart. Use the small holes that are on the topof the black plastic end caps. Connect the spring on the left end of the cart to the ForceSensor’s hook. Lay the other spring in the accessory tray on top of the cart.7. Pull the cart away from the Force Sensor so the left end of the cart is 20 centimeters fromthe end of the Force Sensor. This should stretch the spring slightly. Hold the cart in place.Put a mark on the Dynamics Track to indicate the initial setup position of the left end of thecart.• Use the mark as a reference line during the data recording process.Reference linePre-Lab PART III: Data Recording1. Press the tare button on Force Sensor to zero the Force Sensor.2. Start data recording. The program will begin Keyboard Sampling. Enter 0.000 in units ofmeters (m).In DataStudio , move the Table display so you can see it clearly.• Click on the ‘Start’ button to start recording data. The ‘Start’ button changes to a ‘Keep’and a ‘Stop’ button ( ). The Force will appear in the first cell in the Tabledisplay. Click the ‘Keep’ button to record the force value.In ScienceWorkshop , click the ‘REC’ button to begin collecting data.• The ‘Keyboard Sampling’ window will open. Move it so you can also see the Digitsdisplay. Type in ‘0’ as the stretch. Click ‘Enter’ to record the stretch and force values. Theentered stretch value will appear in the Data list.3. Pull the cart 2 additional centimeters (0.02 meters) away from the Force Sensor. Use themark on the Dynamics Track at the left end of the cart as your reference line. Hold the cartat the new position.4. Enter 0.02 m in the software. Record a Force value for your second Stretch position byclicking ‘Keep’ in DataStudio, or ‘Enter’ in ScienceWorkshop.5. Pull the cart so it is 4 centimeters (0.04 m) away from the reference line and hold the cart atthe new position. Enter 0.04 m in the software. Record a Force value at this position.6. Continue to move the cart in 2-cm increments until the left edge of the cart is 24 cm fromthe reference line. Enter the stretch and record a Force value at each new position.7. End data recording.• In DataStudio, stop data recording by clicking on the ‘Stop’ button.• In ScienceWorkshop, stop data recording by clicking the Stop Sampling button in theKeyboard Sampling window.• The data will appear as Run #1.P15 ©1999 PASCO scientific p. 99
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