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Understanding Motion through Distance-Time Graphs, Study notes of Physics

Mohave Community CollegePhysics

How distance-time graphs help represent the motion of an object, allowing us to understand speed and velocity. It provides examples of calculating speed from graphs and determining which runner is moving faster based on the graph's steepness.

Typology: Study notes

2021/2022

Uploaded on 09/12/2022

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Distance-time Graphs
Describing the motion of an object is occasionally hard to do with words. Sometimes
graphs help make motion easier to picture, and therefore understand.
Remember:
•Motion is a change in position measured by distance and time.
•Speed tells us the rate at which an object moves.
•Velocity tel ls t he speed and d irection of a mov ing objec t.
Name: _______________________________
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Download Understanding Motion through Distance-Time Graphs and more Study notes Physics in PDF only on Docsity!

Distance-time Graphs

Describing the motion of an object is occasionally hard to do with words. Sometimes graphs help make motion easier to picture, and therefore understand. Remember:

  • Motion is a change in position measured by distance and time.
  • Speed tells us the rate at which an object moves.
  • Velocity tells the speed and direction of a moving object. Name: _______________________________

Summary: A distance-time graph tells us how far an object has moved with time.

  • The steeper the line, the faster the motion.
  • A horizontal line (ßà) means the object is not changing its position - it is not moving, it is at rest. We can also use the graph to determine the speed of an object.
  1. The amount the graph goes up represents the distance traveled (20 meters).
  2. The amount the graph goes over represents the time ( seconds).
  3. We can then calculate speed by dividing 20 meters by 2 seconds to get 10 m/s. Goes up 20 meters Goes over 2 seconds

Calculate the speed of runner A and B and then graph each of the following runners.

Runner A runs 40 m in 2 seconds. Runner B runs 20 m in 2 seconds. Describe how you can look at the graph and determine which runner is moving faster. ______________________________________________________________

Runner A runs 30 m in 2 seconds. Runner B runs 40 m in 3 seconds. Describe how you can look at the graph and determine which runner is moving faster. ______________________________________________________________