LAB

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LAB 9

• Roller Coaster Energy Audit
• Conservation of Energy

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GOALS

• TO ACCOUNT FOR THE MECHANICAL ENERGY OF A BALL
  ROLLING ON THE COASTER
• POTENTIAL ENERGY (GRAVITATIONAL)
• KINETIC ENERGY
• ENERGY LOST TO FRICTION

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FORMS OF ENERGY DEFINED
POTENTIAL GRAVITATIONAL
PEg mgDh
KINETIC ENERGY OF MOTION
KE ½ mv2
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Lab 9 Roller Coaster Energy Audit
CONSERVATION OF ENERGY
PE lost KE gain
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Lab 9 Roller Coaster Energy Audit
Determine Total Energy
Total Energy PEg at start
Dh1
h 0
PEg mgDh
PEg 0
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PROCEDUREDETERMINE PEg

• MEASURE THE HEIGHT OF THE TRACK (h) ABOVE THE
  BASELINE (H 0) AT .1m INTERVALS IN THE
  HORIZONTAL
• CALCULATE PEg OF MARBLE FOR EACH HORIZONTAL
  POSITION

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Lab 9 Roller Coaster Energy Audit
Determine PEg
Dh1
Dh2
Dh3
etc.
h 0
PEg mgDh
PEg 0
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PROCEDUREDETERMINE KE

• POSITION THE PHOTOGATE TIMER AT EACH SUCCESSIVE
  .1 m MARKS FOR EACH TRIAL
• RELEASE THE MARBLE FROM THE TOP OF THE TRACK,
  RECORD TIME OF BEAM INTERRUPTION
• REPEAT TRIALS UNTIL PHOTOGATE HAS REACHED THE END
  OF THE TRACK

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Lab 9 Roller Coaster Energy Audit
Determine KE
V1 0
photogate
V2
V3
KE ½ mv2
V diameter/tphoto
V d/t
V ?
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DATA TABLE Part 1
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GRAPH PART 1
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GRAPH PART 1
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LAB 9 Part 2

• Create an IP Sim of Rollercoaster Repeat

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Lab 9 Roller Coaster Energy Audit
Part 2 IP Sim
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Lab 9 Roller Coaster Energy Audit
Determine PE KE at each X Position
Dh1
PEg 0
Dh2
etc.
Dh3
h 0
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DATA TABLE Part 2
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GRAPH PART 2
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GRAPH PART 2 I.P.
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WRITE-UP

• ABSTRACT
• BACKGROUND
• METHOD
• IP SIM SCREEN DUMP EMBELLISHED
• SHOW VECTORS
• SAMPLE CALCULATIONS
• PEg
• VELOCITY
• KE
• DATA TABLES
• GRAPHS
• SCATTER GRAPH, CONNECT DATA POINTS
• GRAPH ANALYSIS
• CONCLUSION

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SKETCH
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Lab 9 Roller Coaster Energy