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Chapter 13 Forces in Motion

Chapter 13 Forces in Motion. Section 1 Gravity: A Force of Attraction. Sir Isaac Newton. The Law of Universal Gravitation Newton realized that the same unbalanced force acted on the apple, the moon and every other object that has mass He called this unbalanced force of attraction - gravity.

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Chapter 13 Forces in Motion

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  1. Chapter 13Forces in Motion Section 1 Gravity: A Force of Attraction

  2. Sir Isaac Newton • The Law of Universal Gravitation • Newton realized that the same unbalanced force acted on the apple, the moon and every other object that has mass • He called this unbalanced force of attraction - gravity.

  3. Gravitational Force • Gravitational force increases as mass increases. • Gravitational force decreases as distance increases.

  4. Gravity • Gravityis a force of attraction between objects that is due to their masses. • Weightis a measure of the gravitational force exerted on an object.

  5. Weight vs. Mass • Your weight is determined by a spring scale. If you weighed 100 lbs. here on earth you would weigh only about 17 lbs. on the moon. Why? Because the moon is one sixth of the Earth’s mass and attracts you with only one sixth of the Earth’s gravitational force. Your mass is the same on the moon as it is on the Earth.

  6. TTFN

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