satellites l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Satellites PowerPoint Presentation
Download Presentation
Satellites

Loading in 2 Seconds...

play fullscreen
1 / 9

Satellites - PowerPoint PPT Presentation


  • 135 Views
  • Uploaded on

Satellites. What keeps them in orbit?. Satellites. A satellite is any projectile given a large enough velocity so its path follows the curvature of the earth. How fast is the earth moving?. The earth moves 8000 m in the “X” direction and 4.9 m in the “Y” direction every second.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Satellites' - eman


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
satellites

Satellites

What keeps them in orbit?

satellites2
Satellites
  • A satellite is any projectile given a large enough velocity so its path follows the curvature of the earth.
how fast is the earth moving
How fast is the earth moving?
  • The earth moves 8000 m in the “X” direction and 4.9 m in the “Y” direction every second.
  • Therefore, if a projectile moves equal or greater than that speed it will follow the curvature of the earth (it will never collide with earth)
what makes a satellite go
What makes a satellite go?
  • All objects in circular motion must have a force.
  • The centripetal force (inward force) acting on a satellite is gravity.
  • Gravity pulls any satellite towards the center of the earth.
  • Gravity must equal centripetal force in order for satellites to orbit
  • What happens if its less? greater?
facts about satellites
Facts about satellites
  • As the distance from earth increase:
    • Radius increase
    • Force of gravity decreases
    • Acceleration decreases
    • Result = required velocity is less
satellite problem constants
Satellite problem constants
  • Radius of the earth = 6.38 x 106 m
  • Mass of the earth = 5.97 x 1024 kg
  • Remember…the radius of a satellite is the height above the surface of the earth plus the radius of the earth.
satellite practice problems 1
Satellite Practice Problems #1
  • Find the altitude of a satellite orbiting earth if it is moving at 6,900 m/s and the pull of gravity is 5.69 m/s2
  • Answer: a = v2

r

  • Solve for “r”
satellite practice problems 18
Satellite Practice Problems #1
  • R = (6,900 m/s)2

5.69 m/s2

  • R = 8.4 x 106 m - 6.38 x 106 m
  • R = 2.02 x 106 m
satellite practice problems 2
Satellite Practice Problems #2
  • Find the velocity needed to keep a satellite orbiting if it is accelerating at a rate of 8.2 m/s2 and it is 500 km above the surface of the earth.
  • Answer: a = v2

r

  • v2 = a x r …v = (sqrt)8.2 x 6370000.5m
  • v = 7227.3 m/s