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Orbiting Satellites

Section 5.5. Orbiting Satellites. Circular Motion. Any motion that causes an object to move in a circle. A force is needed to cause this motion Ex. The Sun’s gravity is the force that causes the Earth’s circular motion around the sun. How do rockets lift off?. because of Newton’s Third Law

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Orbiting Satellites

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  1. Section 5.5 Orbiting Satellites

  2. Circular Motion • Any motion that causes an object to move in a circle. • A force is needed to cause this motion • Ex. The Sun’s gravity is the force that causes the Earth’s circular motion around the sun

  3. How do rockets lift off? • because of Newton’s Third Law • (For every action, there is an equal but opposite reaction) • Action: the rocket pushes the exhaust gas downward • Reaction: the exhaust pushes the rocket upwards

  4. What is a Satellite? • Our moon is Earth’s satellite. • Earth is the Sun’s satellite • The screwdriver that an astronaut lost while working on the space station that is now orbiting Earth is a satellite • Satellite – any object that travels around another object in space

  5. Orbit • If an object launches at different speeds, it can have different orbits or lack thereof • Orbit is an object “falling around” a larger object in space • The faster an objects velocity, the further it can go

  6. Orbital Speeds • Objects that are in close orbit, move faster then objects that are far away • Think about our solar system (I know you studied this last year!) • Mercury is the planet closest to the Sun and orbits the fastest of all of the planets • Neptune is planet furthest from the Sun and orbits the slowest of all of the planets

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