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Motion

Motion. Mrs. Wharton’s Science Class. M otion. An object is in motion if it changes position relative to a reference point Reference Point- is a place or object used for comparison to determine if something is in motion. Motion measurement. Uses the SI system of units.

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Motion

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  1. Motion Mrs. Wharton’s Science Class

  2. Motion • An object is in motion if it changes position relative to a reference point • Reference Point- is a place or object used for comparison to determine if something is in motion.

  3. Motion measurement • Uses the SI system of units. • Based on the unit 10 • SI unit for length is meter. • Centimeters may also be used

  4. Calculating Speed • Rate- the amount of something that occurs or changes in one unit of time • Speed is a type of rate • If you know the distance an object travels in a certain amount of time you can determine the speed. • Speed- of an object is the distance the objects travels in one unit of time. • S=D/T

  5. Average vs. Instantaneous speed • Average speed- of an object , you divide the total distance traveled by the total time • Instantaneous speed-is the rate it is moving at a given instant.

  6. Speed Vs. Velocity • Speed- tells you how fast it is moving but not in what direction. • Velocity – when you know both the speed and the direction of an object in motion; (speed in a given direction.)

  7. Distance vs. Time Graph You can show the motion of an object on a line graph which you plot distance v time • A straight line represents motion at a constant speed • A horizontal line represents an object that is not moving at all • The steepness of a line’s slope depends on the speed of an object.

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