1 / 26

Devil physics The baddest class on campus Pre-IB Physics

Devil physics The baddest class on campus Pre-IB Physics. Giancoli Section 5-8 Satellites and “weightlessness”. Objectives . Calculate the radius of a satellite’s orbit given its height above the earth’s surface and the radius of the earth.

kellsie
Download Presentation

Devil physics The baddest class on campus Pre-IB Physics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Devil physicsThe baddest class on campusPre-IB Physics

  2. Giancoli Section 5-8Satellites and “weightlessness”

  3. Objectives • Calculate the radius of a satellite’s orbit given its height above the earth’s surface and the radius of the earth. • Understand that for any given velocity, there is only one distance from the center of the earth at which the satellite can remain in orbit. • Understand that for any given altitude, there is only one velocity at which the satellite can remain in orbit.

  4. Objectives • Calculate the altitude at which a satellite must orbit for a given velocity. • Calculate the velocity at which a satellite must orbit for a given altitude. • Understand the meaning of ‘apparent weight’ and ‘apparent weightlessness’.

  5. Girl in Elevator FN Fg

  6. Girl in Elevator FN • Elevator not moving • Acceleration zero Fg

  7. Girl in Elevator FN • Elevator moving up • Acceleration Positive Fg

  8. Girl in Elevator FN • Elevator moving down • Acceleration Negative Fg

  9. Girl in Elevator FN • Elevator cable breaks • Girl plummeting to her death, but remains calm Fg

  10. Weightlessness • Weightlessness on a Motorcycle • Motorcycle Jump • Weightlessness on Skis • Ski Jump • Weightlessness in a Cage • ?????

  11. Weightlessness and Space ??? • How do you keep from losing satellites? ???

  12. Weightlessness and Space FG mac

  13. Weightlessness and Space FG mac

  14. Weightlessness and Space FG mac

  15. Weightlessness and Space h re

  16. Weightlessness and Space FG mac

  17. Weightlessness and Space • What happens if we change speed? FG mac

  18. Weightlessness and Space • If velocity increases, the force needed to keep the shuttle in orbit increases. Since the earth’s gravity doesn’t change, the shuttle will leave the circular orbit. FG mac

  19. Weightlessness and Space • If velocity decreases, the gravitational force is now stronger than the radial acceleration and it will pull the shuttle toward the earth, which will increase gravitational force, and the shuttle will be pulled down to the earth’s surface. FG mac

  20. Weightlessness and Space • Only one speed for a given orbit (radius) • Only one orbit (radius) for a given speed FG mac

  21. Space Away From Earth FG-Moon FG-Sun FG-Earth

  22. Gravitational Force and Motion of Planets

  23. Σary Review • Can you calculate the radius of a satellite’s orbit given its height above the earth’s surface and the radius of the earth? • Do you understand that for any given velocity, there is only one distance from the center of the earth at which the satellite can remain in orbit? • Do you understand that for any given altitude, there is only one velocity at which the satellite can remain in orbit?

  24. Σary Review • Can you calculate the altitude at which a satellite must orbit for a given velocity? • Can you calculate the velocity at which a satellite must orbit for a given altitude? • Do you understand the meaning of ‘apparent weight’ and ‘apparent weightlessness’?

  25. Questions?

  26. Homework #39-49

More Related