Concepts of Physics
Chapters 12–14
Other Chapters
Color Key
Black: In Class
Green: Due/Test
Red: Homework
Blue: Related links
Updated 3.21.2010
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Cool Links:
Spy Satellite Images - Williamsport | Mr. Flint's Pad | Lake Courage (lake where Mr. Flint worked for 10 years) | WAHS
How does the GPS system work? | Another GPS link - more detailed
Moon Hoax - Site 1 | Site 2 | Site 3 | Site 4
Download a gravity simulation - Gravitator 2 (Mac), Gravitation 5.0 (Windows)
Thursday, March 4
- Return Chapters 9 & 10 Quizzes
- Field trip: a tour of the solar system
- Orbit demonstration in Starry Night
Friday, March 5 – No School – Teacher Inservice
Monday, March 8
- Intro. to Gravity lab
- Speed of the Earth in orbit
- Satellites as high speed projectiles
- What gravity Really is - an attraction between any two pieces of mass in the universe
- What gravity isn't caused by only by planets, spinning objects or the atmosphere
- Universal law of graviation (example problems); calculating Saturn's graviational attraction to the Sun
- Elliptical orbits
Thursday, March 11
- P. 180, 15–20 due
- Read What is GPS? by today
- Review "What is GPS?"
Friday, March 12
- P. 181, 22–27 due
- Homework Q&A
- How to calculate g
- Pass out "It's a g thing"
- Look at StarryNight simulations
Monday, March 15
- Gravity Lab Due
- Types of orbits
- There are about 8000 satellites in orbit right now. Most are operational.
- STS/ISS orbit
- Geosynchronous orbits (weather, etc.) 4.23 e7 m *GPS info. for 2nd period
- Iridium satellite phones called iridium because there were 77 satellites. Now there are just 66. Polar orbit of 421 miles above the earth's surface.
- Military surveillance satellites are not geosychronous
- Elliptical orbits (XM vs. Sirius)
- Russia launched Sirius satellites aboard Proton rockets
- There are three Sirius satellites in elliptical orbit so that at least two are above the U.S. at all times
- Boeing's SeaLaunch launched 2 XM satellites from a ship at the equator into geosynchronous orbit; one at 85°W longitude (Rock) and the other at 115°W longitude (Roll). A third backup is on the ground and will be launched in case of failure.
Wednesday, March 17 – Mr. Flint away at a conference
Thursday, March 18 – Mr. Flint away at a conference
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