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Distance and Displacement

Distance and Displacement. Chapter 11.1. Motion. An object is in motion when its distance from another object is changing. If no chance than no motion is perceived. Frame of Reference. Frame of reference is a place or object that you assume is fixed

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Distance and Displacement

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  1. Distance and Displacement Chapter 11.1

  2. Motion • An object is in motion when its distance from another object is changing. • If no chance than no motion is perceived

  3. Frame of Reference • Frame of reference is a place or object that you assume is fixed • observations of how objects move in relation to that frame of reference. • perception of motion depends on the observers frame of reference. • Humans usually use the earth as their frame of reference.

  4. Measuring Distance • Distance: The length of a path between 2 points. • Distance is measured according to the amount of distance involved • EX: • Marble rolls= mm or cm (millimeters or centimeters) • Car travels= m or Km ( meters or kilometers)

  5. Displacement • Displacement: the direction from the starting point and the length of a strait line from the starting point to the ending point. • Displacement is what we use to give people directions to our house. • Ex: walk north 5 blocks from the school take a right a distance with a direction associated with it

  6. Displacement Vs distance displacement distance

  7. Combining Displacements • An example of this is a vector. • This is a quantity that has a magnitude and a direction • Magnitude= size length or amount • Arrows on a graph are used to represent vectors. • The length of an arrow shows the magnitude of a vector

  8. Examples Combining displacements • Vector addition is the combining of vector magnitudes and directions • EX: 5km 10km 5 + 10= 15km 10km 3km 10 – 3= 7 km

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