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