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phy123:lab_4 [2009/10/09 12:10]
mdawber
phy123:lab_4 [2009/10/09 12:22] (current)
mdawber
Line 80: Line 80:
 ===== Experimental Procedure ===== ===== Experimental Procedure =====
  
-A battery-powered photo gate is mounted on the glider. ​ When activated with the small push button on the side of the glider, the photo gate turns on a bright light emitting diode (LED) whenever the picket fence over the air track blocks the photo gate.  A light sensor at the end of the air track receives the LED signals and the timing program in the computer measures and records the times when the light beam of the photo gate is blocked.+A battery-powered photo gate is mounted on the glider. ​ When activated with the small push button on the side of the glider, the photo gate turns on a bright light emitting diode (LED) whenever the picket fence over the air track blocks the photo gate.  A light sensor at the end of the air track receives the LED signals and the timing program in the computer measures and records the times when the light beam of the photo gate is blocked. ​**Of course you need to make sure the LED on the base of the glider is facing the receiver on the track.**
  
 A small mass is attached to the glider via a string on a level air track. ​ When we drop the small mass, the change in height of the small mass can be measured, as well as the velocity of the glider-mass system. ​ This will allow the computation of the sum of kinetic and potential energies before and after the mass falls and verify (or dismiss!) the law of the conservation of mechanical energy as a useful concept.  ​ A small mass is attached to the glider via a string on a level air track. ​ When we drop the small mass, the change in height of the small mass can be measured, as well as the velocity of the glider-mass system. ​ This will allow the computation of the sum of kinetic and potential energies before and after the mass falls and verify (or dismiss!) the law of the conservation of mechanical energy as a useful concept.  ​
phy123/lab_4.txt ยท Last modified: 2009/10/09 12:22 by mdawber
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