Phys 1 Student Workbook.pdf

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Physics Labs with Computers, Vol. 1Student WorkbookP24: Conservation of Linear and Angular Momentum 012-07000AFor You To DoUse the Projectile Launcher to shoot the ball into the Projectile Catcher mounted on the RotatingPlatform. Use the Photogate/Pulley System to measure the motion of the Rotating Platform afterthe ball is captured. Use DataStudio or ScienceWorkshop to obtain the angular velocity of thesystem. From the data, calculate the average initial linear velocity of the ball.PART I: Computer Setup1. Leave the Photogate’s phone plug connected to Digital Channel1 on the interface.2. Open the document titled as shown:500 scientificPASCOInterfacescientific 300PASCOANALOG CHANNELSScienceW orkshop DATA LOGGING INSTRUCTIONSScienceWorkshopInterfaceDataStudio ScienceWorkshop (Mac) ScienceWorkshop (Win)P24 Linear Angular.DS P28 Cons Linear & Ang Mom P28_CLAM.SWS• The DataStudio document has a Workbook display. Read the instructions in the Workbook.• The ScienceWorkshop document has a Table display of angular velocity.PART II: Sensor Calibration and Equipment Setup• You do not need to calibrate the Photogate/Pulley System.1. Measure the distance from the axis of the Rotating Platform to the center of the ball in theCatcher. Record the distance as the radius, R, in the Data section.2. Remove the ball from the Projectile Catcher. Measure the mass of the ball, mb, and recordthe value in the Data section.3. Remove the Photogate/Pulley System from the Rotating Platform’s supportpost and also remove the support post. Remove the pulley so you can use thePhotogate. Remove the swivel clamp from the side of the Photogate.4. Attach the Photogate to the Rotating Platform’s short threaded rod. Mount thePhotogate to the base of the Rotating Platform.5. Adjust the position of the threaded rod so the Photogate is aligned with theholes on the bottom lip of the Rotating Platform’s step pulley.® PHOTOGATE HEADASSEMBLY NO.003-06268® PHOTOGATE HEADASSEMBLY NO.003-06268p. 174 ©1999 PASCO scientific P24
Name _____________________ Class ______________ Date _________6. Clamp the Projectile Launcher in position so it can fire the ball into the catcher that ismounted on the Rotating Platform.ProjectileLauncher–Top View7. Move the platform so the edge of the Catcher is against the muzzle of the Launcher and theplatform is perpendicular to the line-of-flight of the Launcher.8. Adjust the base of the Rotating Platform so that the Photogate beam is unblocked (the redlight-emitting diode is OFF).9. Use a spirit level to check the rotating platform. Re-level the platform, if necessary.PART IIIA: Data Recording – Catch the Ball1. Place the ball in the Projectile Launcher and cock the launcher to its long-range position.2. Place the Rotating Platform so the end of the catcher is next to the muzzle of the Launcher.3. Begin data recording. Pull upward on the string of the launcher to fire the ball into thecatcher.4. Stop data recording just before the rotating platform swings around to the launcher. Stopthe rotating platform before it reaches the launcher.• Do not let the Rotating Platform and Catcher collide with the launcher.5. Repeat the data recording process a total of five times.• Be careful when removing the ball from the catcher. Do not change the position of thecatcher on the platform.PART IIIB: Data Recording – Measure Initial Speed of the Projectile1. Move the Rotating Platform out of the way of the Projectile Launcher. Aim the Launcheraway from the table. Clear an area at least three meters from the table.2. Put the ball into the Projectile Launcher and cock the Launcher to the long-range position.Fire one shot to locate where the ball hits the floor.3. Tape a piece of white paper at the spot where the ball hit the floor. Tape a piece of carbonpaper (carbon-side DOWN) on top of the white paper.4. Fire five shots.5. Measure the vertical distance from the bottom of the ball as it leaves the Launcher to thefloor.P24 ©1999 PASCO scientific p. 175
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Phys 1 Student Workbook.pdf

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