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Gravity

Gravity. What is Gravity?. Bellringer. Pick up a Brain Pop: Observation Chart from the front table. You have five minutes from the time the bell rings to complete it. After you have completed your Bellringer write your homework in your Planner. Objectives.

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Gravity

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  1. Gravity What is Gravity?

  2. Bellringer Pick up a Brain Pop: Observation Chart from the front table. You have five minutes from the time the bell rings to complete it. After you have completed your Bellringer write your homework in your Planner

  3. Objectives TLW be able to describe what determines the strength of the force of gravity between two objects. Explain what two factors combine to keep the moon & Earth in orbit.

  4. Gravity Terms Force Gravity Law of universal gravitation Mass Weight Inertia

  5. Gravity What keeps Earth & the moon in orbit? Why don’t they just fly off into space?

  6. Gravity The force that attracts bodies of matter toward each other. Force: Push or a pull The force that holds the moon in orbit is different; it acts over long distances between objects that are not in contact.

  7. Gravity Gravity: A force that attracts all objects toward each other. Newton’s law of universal gravitation: Every object in the universe attracts every other object.

  8. Gravity The strength of the force of gravity between two objects depends on two factors: The mass of the object The distance between them

  9. Gravity Mass: The amount of (stuff) matter in an object Weight: The force exerted on an object’s mass by gravity.

  10. Mass & Distance Objects that are far apart exert less gravitational force on each other than objects that are close together.

  11. Mass & Distance Force of Gravity Gravity attracts all objects toward one another If mass increases, force also increases

  12. Mass & Distance Force of Gravity If distance increases, force decreases.

  13. Inertia & Orbital Motion If the sun & Earth are constantly pulling on one another because of gravity, why doesn’t Earth fall into the Sun?

  14. Inertia & Orbital Motion Inertia: The tendency of an object to resist a change in motion.

  15. Inertia & Orbital Motion Newton concluded that two factors: Inertia Gravity Combine to keep Earth in orbit around the sun & the moon in orbit around the Earth.

  16. Conclusion TLW be able to describe what determines the strength of the force of gravity between two objects. Explain what two factors combine to keep the moon & Earth in orbit.

  17. Activity Falling to Earth Falling Race Paper Race Trick Paper Parachute Tests

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