Phys 1 Student Workbook.pdf

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Physics Labs with Computers, Vol. 1Student WorkbookP13: Buoyant Force 012-07000AFor You To DoUse the Force Sensor to measure the force on an object as it is lowered into water. Use‘Keyboard Sampling’ to enter the depth values. Use DataStudio or ScienceWorkshop to plot theforce versus submerged depth to obtain the density of the fluid.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)P13 Buoyant Force.DS P18 Buoyant Force P18_BUOY.SWS• The DataStudio document has a Workbook display. Read the instructions in theWorkbook.• The ScienceWorkshop document has a Graph display with Force versus Depth.• Data recording is set for 1 Hz. Keyboard Sampling allows the user to enter the submergeddepth in meters.PART II: Sensor Calibration and Equipment Setup• To calibrate the Force Sensor, refer to the description in the Force Sensor Manual.1. Mount the Force Sensor on a horizontal rod with thehook end down.2. Using the calipers, measure the diameter of the metalcylinder. From the diameter, calculate the radius andthe cross-section area. Record the cross-section areain the Data Table in the Lab Report section. Recall:A= πR23. Hang the metal cylinder from the Force Sensor hookwith a string.4. Put about 800 mL of water into the beaker and placethe beaker on the lab jack below the hanging cylinder.The bottom of the cylinder should be touching thewater.5. Position the metric ruler next to the edge of the labjack. Note the initial height of the top of the lab jack.p. 84 ©1999 PASCO scientific P13
Name _____________________ Class ______________ Date _________PART III: Data Recording• Before recording data for later analysis, you may wish to practice using keyboard samplingto collect data.1. With the cylinder attached to the Force Sensor hook, press the tare button on the ForceSensor to zero the sensor.2. Record Force vs. Depth data as you submerge the cylinder.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.• Immerse the cylinder 5 millimeters (5 mm or 0.005 m) by raising the beaker of water 5 mmwith the lab jack. Use the metric ruler to measure the distance that you raise the lab jack.• Click the Keep button to record the next Force value at the depth of 0.005 m.• Increase the depth of submersion by increments of 5 mm. After each increase in thesubmersion, wait for the force reading in the display to stabilize, then click the Keep buttonto record a Force value at the appropriate depth.• Repeat the data recording procedure until the top of the cylinder is submerged. Stop datarecording by clicking on the ‘Stop’ button. Run #1 will appear in the Summary window.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. The default value for ‘Entry #1’ is 10.000.• Because the cylinder is not submerged, type in ‘0’ as the depth. Click ‘Enter’ to record thedepth and force values. The entered depth value willappear in the Data list.• Immerse the cylinder 5 millimeters (5 mm or 0.005 m) byraising the beaker of water 5 mm with the lab jack. Usethe metric ruler to measure the distance that you raise thelab jack.• For ‘Entry #2’, type in ‘0.005’ (5 millimeters). Click‘Enter’ to record the depth and force values.• Increase the depth of submersion by increments of 5 mm.After each increase in the submersion, wait for the force reading in the Digits display tostabilize, then click the Enter button to record a Force value at the appropriate depth.• Repeat the data recording procedure until the top of the cylinder is submerged. Stop datarecording by clicking the ‘Stop Sampling’ button in the ‘Keyboard Sampling’ window.• The ‘Keyboard Sampling’ window will disappear. ‘Run #1’ will appear in the Data List inthe Experiment Setup window.P13 ©1999 PASCO scientific p. 85
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