P5a Satellites And Circular Motion

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P5a Satellites And Circular Motion

  1. 1. P5a ‘Satellites and circular motion’
  2. 2. P5a - What’s in today’s lesson? <ul><li>Artificial satellites: low polar and geostationary orbits </li></ul><ul><li>Gravity: How does gravitational force affect objects? </li></ul><ul><li>Circular motion: What keeps things orbiting? </li></ul>
  3. 3. Low polar orbits <ul><li>Where? </li></ul><ul><li>Time to orbit? </li></ul><ul><li>Uses? </li></ul>
  4. 4. Geostationary orbits <ul><li>Where? </li></ul><ul><li>Time to orbit? </li></ul><ul><li>Uses? </li></ul>
  5. 5. Gravitational force
  6. 6. Gravitational force <ul><li>Strength of gravitational pull between two objects depends on two things: </li></ul>M 1 M 2 d
  7. 7. Gravitational force <ul><li>So the closer to the Sun or another planet, the ________ the gravitational pull and the _________ an object will move </li></ul><ul><li>Q ~ Which planet orbits the sun fastest? </li></ul>
  8. 8. Circular motion (p148) <ul><li>Centripetal force is… </li></ul>
  9. 9. Why don’t satellites fall?
  10. 10. Why don’t satellites fall?
  11. 11. P5a - What was in today’s lesson? <ul><li>Artificial satellites: low polar and geostationary orbits </li></ul><ul><li>Gravity: How does gravitational force affect objects? </li></ul><ul><li>Circular motion: What keeps things orbiting? </li></ul>

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