Animated Physics - Gravitation

1. Gravity - on the surface of Earth
 (a) Ball - bounced and thrown(b) Ball - shot from a cannon
  • 10 frames per second real time
  • ten calculations per frame means 100 calculations per second
  • centimeter resolution of calculations
     
  • about a second to bounce a ball
  • three seconds to throw ball over house
     
  • 21,000 km viewing width zoomed in to 90 meters
2. Gravity - Spacestation orbiting Earth
 (a) 100 seconds/frame (1min 40sec)(b) 200 seconds/frame (3min 20sec)
  • variable frame rate
  • meter sized resolution of calculations
     
  • 90 minutes for space station orbit
  • 24 hour geosynchronous orbit
  • 27 day moon orbit with movement of earth visible
     
  • 50,000 km width zoomed to 1.8 million km
3. Gravity - geosynchronous and Earth/Moon orbits
(a) 16min 40sec framerate - 24 hour orbit(b) 5hour 33min framerate - Moons orbit(c) 5hour 33min framerate - Zoomed on Earth