Gravity: A Force and Motion

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Presentation transcript:

Gravity: A Force and Motion Chapter 5 Lesson 2 Gravity: A Force and Motion

Gravity Gravity- a force of attraction between objects that is due to their masses All matter is affected by gravity because of mass Gravity is a result of mass The Earth’s gravity must be overcome for an object to move

The Law of Universal Gravitation Law that was designed by Sir Isaac Newton Law of Universal Gravitation describes the relationship between gravitational force, mass, and distance Part 1- Gravitational force increases as mass increases Part 2- Gravitational force decreases as distance increases

Law of Universal Gravitation

Weight is a Measure of Gravitational Force Weight- a measure of the gravitational force exerted on an object Weight is measured in Newton (N) Mass- the amount of matter in an object, its value does not change Mass is the same everywhere; weight changes with location

What Keeps Objects in Motion Inertia- tendency of of object to resist change in motion Newton’s 1st Law of Motion- All objects will stay at rest or stay in motion until acted upon by an outside force Planets orbit the sun due to 2 factors- inertia and gravity

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