Phys 1 Student Workbook.pdf

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Physics Labs with Computers, Vol. 1Student WorkbookTutorial Activities: Motion Sensor 012-07000AMotion Sensor IIThe Motion Sensor II is a sonar ranging device. It sends out ultrasonic pulses and detects echoesof these pulses that are reflected from an object. The sensor includes a cable for connecting to theinterface. One end of the cableconnects to the sensor. The other endhas two stereo phone plugs thatconnect to the interface. The yellowplug carries the ‘transmit pulse’signal from the interface. The otherplug returns the echo to the interface.The sensor can measure objects asclose as 15 cm (0.15 m) or as far as 8m. You can use the software to setthe number of pulses (the ‘trigger rate’) from as few as five per second to as many as 120 persecond.The sensor has one built-in control.Narrow/Standard (Std.) Switch: Set the switch to Narrow for measuring highly reflectivetargets (such as a PASCO cart) at distances of 2 m or less. Set the switch to Std for measuringtargets that are poor reflectors or for distances longer than 2 m.Note: On the Standard setting, you may need to tilt the sensor up by five or ten degrees to avoidreflections from the front of the sensor housing or from a surface underneath the sensor.For this activity you will need a meter stick and a highly reflective target, such as a book.Set up the sensor• Plug the modular connector on one end of the interface cable into the side of the MotionSensor. Connect the yellow phone plug into Digital Channel 1 on the interface. Connectthe other phone plug into Digital Channel 2.• Place the sensor exactly one meter away from a target. Arrange the sensor and target so thepulses from the sensor can reflect from the target and be detected by the sensor.1 meter500 scientificPASCOInterfacescientific300PASCOANALOG CHANNELSScienceW orkshop DATA LOGGING INSTRUCTIONSScienceWorkshopInterfaceA - 30©1999 PASCO scientific
Student Workbook Physics Labs with Computers, Vol. 1012-07000A Tutorial Activities: Motion SensorSet up the sensor in the software• In DataStudio, double-click the name of the sensor in the Sensors list in the ExperimentSetup window. Result: The sensor icon appears below the digital channels of the interface.The sensor’s parameters (e.g., Position, etc.) appear in the Data list.Find the nameof the sensor.• In ScienceWorkshop, click-and-drag the ‘digital sensor plug’ icon to the Channel 1 icon inthe Experiment Setup window, select the name of the sensor from the list of sensors andclick ‘OK’ to return to the Experiment Setup window. Result: The sensor’s calibrationwindow opens and the sensor begins to click a few times per second.Calibrate the sensorThe general method for calibrating the motion sensor is as follows:1. In the DataStudio Experiment Setup window, double-click the sensor’s icon. Result: TheSensor Properties window opens.2. Click the ‘Motion Sensor’ tab. Result: The calibration window opens and the sensorbegins to click a few times per second.©1999 PASCO scientific A - 31
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Phys 1 Student Workbook.pdf

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