Unit 4 AKS 8a Notes:distance & displacement
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Questions and Answers

What defines distance in motion?

  • The shortest route taken by the object
  • The difference between starting and ending positions
  • The straight line from start to finish
  • The total amount of space an object has covered (correct)

Which statement accurately describes displacement?

  • It is the angle covered during motion
  • It is always greater than or equal to distance
  • It includes the total path taken by the object
  • It measures the shortest distance between two points (correct)

If a car travels in a circular path and returns to its starting point, what is its displacement?

  • The circumference of the circle
  • Equal to the total distance traveled
  • Zero, because it returns to the start (correct)
  • The diameter of the circle

In a scenario where someone walks 3 meters east, then 4 meters west, what is their total distance and displacement?

<p>Distance: 7 meters, Displacement: 1 meter west (D)</p> Signup and view all the answers

Which example illustrates the concept of distance versus displacement in real-world terms?

<p>A cyclist takes a long route but ends near the starting point (C)</p> Signup and view all the answers

How is distance defined in terms of an object's motion?

<p>The total amount of space an object has covered (C)</p> Signup and view all the answers

What does displacement refer to in motion?

<p>The overall change in position from start to finish (B)</p> Signup and view all the answers

If a runner completes a track of 400 meters but ends up at the starting point, what is their displacement?

<p>0 meters (B)</p> Signup and view all the answers

When a hiker walks 5 km north and then 5 km south, what is their total distance and displacement?

<p>10 km distance, 0 km displacement (A)</p> Signup and view all the answers

In a situation where two people are discussing a vehicle's movement, what aspect would indicate the vehicle's displacement?

<p>The difference in starting and ending points of the vehicle (A)</p> Signup and view all the answers

Flashcards

Distance

The total space covered by an object in motion.

Displacement

The change in position from start to finish.

Distance in motion

The total path taken by an object while moving.

Displacement in motion

The direct distance (in a straight line) between the start and end points.

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Tim's displacement

Tim's overall change in position from the starting point.

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What is the car's total path?

The car's distance is the total amount of space it covers while moving.

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What is Tim’s overall position change?

Tim's displacement is the straight-line distance from his starting point to his ending point.

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Distance vs. Displacement

Distance is the total path traveled, while displacement is the change in position from start to finish.

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Displacement: Straight Line

Displacement is always measured in a straight line, even if the object's path was curvy.

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Displacement: Can be Zero

Displacement can be zero if an object ends up back at its starting position, even if it traveled a long distance.

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Study Notes

Distance

  • Distance: The total amount of space an object has covered during its motion.
  • It's a scalar quantity, meaning it only has magnitude (size).
  • It's always positive or zero.
  • Measured in units like meters, kilometers, or miles.

Displacement

  • Displacement: The overall change in position of an object from start to finish.
  • It's a vector quantity, meaning it has both magnitude and direction.
  • It can be positive, negative, or zero.
  • Measured in units like meters, kilometers, or miles.

Example Calculations

  • Visual Example 1: A car travels 25 km to a hill, then 10 km down a hill to another town.

    • Distance: 25 km + 10 km = 35 km
    • Displacement: Depends on the direction, could be 15 km, could be 35 km, or could be 0 km, depending on the start and end points.
  • Visual Example 2: Tim walks 5 meters, then 4 meters sideways to the bushes, then 3 meters towards the school

    • Distance = 5m + 4m + 3m = 12m
    • Displacement: Depends on position from the start and end points. A direct line drawing could give you a better idea about displacement

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Test your understanding of distance and displacement in this quiz. Learn the key differences between these two concepts, including their definitions, measurements, and examples. Explore vector and scalar quantities through practical scenarios.

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