ORBITING SATELLITES

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CHAPTER 2-5

• ORBITING SATELLITES

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A. HOW DO ROCKETS LIFT OFF?
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A. HOW DO ROCKETS LIFT OFF?

• 1. Newtons 3rd law of motion

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• 1. Newtons 3rd law of motion
• a. a rocket can rise into the air
• because the gases it expels
• with a downward force exert a force equal in
  magnitude,
• but opposite in direction

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B. What is a Satellite?................
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B. What is a Satellite?................

• 1. a satellite is any object that travels
  around another object in space.

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• 1. a satellite is any object that travels
  around another object in space.
• 2. Artificial satellites

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• 1. a satellite is any object that travels
  around another object in space.
• 2. Artificial satellites
• a. space research
• b. communications
• c. military intelligence
• d. weather analysis
• e. geographical surveys

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• Artificial satellites travel around the
• Earth in an almost circular path

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• Artificial satellites travel around the
• Earth in an almost circular path
• 1. any force that causes an object to
• move in a circle is called
• centripetal force.

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• Artificial satellites travel around the
• Earth in an almost circular path
• 1. any force that causes an object to
• move in a circle is called
• centripetal force.
• 2. for artificial satellites, the force is
• the gravitational force that pulls
• it toward the center of the Earth

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• Satellites fall forward with the force of inertia

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• Satellites fall forward with the force of inertia
• 1. satellites in orbit around Earth
  continually fall toward Earth,
• but because Earth is curved
• they travel around it.

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THE END

• You are now ready for the standard 2 test on
  forces.