Professor John Goree & Lou Datilio Gravity Weight Falling in Space: Microgravity (Weightlessness)
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Transcript of Professor John Goree & Lou Datilio Gravity Weight Falling in Space: Microgravity (Weightlessness)
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Professor John Goree & Lou Datilio
• Gravity
• Weight
• Falling
• in Space: Microgravity (Weightlessness)
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Q. What keeps you from floating out of your chair, when you are seated?
A. Gravity
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Q. Why does everything dropped (here, the apples) fall downward?
A. Gravity
All things attract one another
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Pictures taken (at regular intervals) of a ball falling
Falling
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All objects fall at the same speed (without air resistance)
Falling
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Demonstration: quarter and feather
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Throwing a ball at different speeds
Falling
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Throwing it hard enough might make it go into orbit around the earth
Falling
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Demonstration:
Java applet
www.physics.uiowa.edu/~stille/
(Fowler’s Physics Applets)
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Weight
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Demonstration:
weight on a bathroom scale
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Weight and Weightlessness inside an elevator
Weight
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Weightlessness:• inside a falling elevator • in a spacecraft,
They are alike, because both are falling
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Video: free fall
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astronauts inside their spacecraft
Weightlessness
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Space Station months
Space shuttle <17 days
Sounding rockets 10 min
KC-135 20 sec
Drop towers 5 sec
Vomit Comet
“Microgravity” = “Weightlessness”
Weightlessness
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Parabolic airplane flights = vomit comet
Microgravity
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Spacecraft: Mir Space Station
Mir: Spring, 2000
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International Space Station
“ISS”
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ISS - Assembly Sequence
1998 - 2006
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International Space Station
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International Space Station
Space
Shuttle
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Video - Space Shuttle launch
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Demonstration cars
Video Astronauts in Space Shuttle
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Demonstration: basketball
Video: basketball in space
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Microgravity
projects
at the Univ. of Iowa Physics Dept.
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PKE - Plasmakristall Experiment Germany, Russia, U.S.
1999 - Parabolic flight tests
2000-01 - ISS• Dec. 2000 - launch• 2001 - the 1st physical sciences
experiment on ISS
PKE flight hardware with 1st & 3rd ISS crews
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PKE accommodation
Zvezda (Russian Service Module)
ISS - assembly 1RJuly 25, 2000
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Inside Zvezda
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Inside Zvezda
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Inside Zvezda
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PKE logo
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• Launched:
• on Russian Progress rocket
• from Baikonur, Kazakhstan
• March, 2001
• Will be done:
• end of 2001
• hardware will go through destructive re-entry
PKE
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Demonstration:
Screen up
Water balloon