Measuring Motion
How do you know something is moving? <ul><li>An object in outer space appears to be stationary in space. How can we tell i...
Point of reference <ul><li>An object that stays in place compared to an object that is moving. </li></ul><ul><li>Examples:...
Motion <ul><li>An objects change in position relative to a reference point. </li></ul>Time = x-axis Distance = y-axis .
This line is not horizontal (at rest)
 
 
Speed Vs. Velocity <ul><li>Speed = Rate at which distance changes over time. S = D/t </li></ul><ul><li>Velocity = speed  w...
Example <ul><li>A bus moves a distance of 150 m East in 10 seconds. </li></ul><ul><ul><li>What is the bus’s average speed?...
<ul><li>S = 150 m/10 s  Speed = 15 m/s </li></ul><ul><li>V = 150 m/10 s  Velocity = 15 m/s East </li></ul><ul><li>Passenge...
Acceleration <ul><li>The rate at which velocity changes over time </li></ul><ul><li>Avg Acceleration =  Final Velocity – S...
 
Velocity Versus Time Graph <ul><li>What is happening from 0 seconds to 8 seconds? </li></ul><ul><li>What is happening from...
Circular Motion <ul><li>Objects moving in circle always change direction, velocity, and acceleration </li></ul>Black arrow...
Upcoming SlideShare
Loading in …5
×

1 Measuring Motion

574 views
376 views

Published on

Published in: Business, Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
574
On SlideShare
0
From Embeds
0
Number of Embeds
72
Actions
Shares
0
Downloads
6
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

1 Measuring Motion

  1. 1. Measuring Motion
  2. 2. How do you know something is moving? <ul><li>An object in outer space appears to be stationary in space. How can we tell it is moving or not moving??? </li></ul><ul><li>Do these answers work for determining is something is moving on Earth? </li></ul>
  3. 3. Point of reference <ul><li>An object that stays in place compared to an object that is moving. </li></ul><ul><li>Examples: North Star, mountains on Earth, buildings, trees, etc </li></ul>
  4. 4. Motion <ul><li>An objects change in position relative to a reference point. </li></ul>Time = x-axis Distance = y-axis .
  5. 5. This line is not horizontal (at rest)
  6. 8. Speed Vs. Velocity <ul><li>Speed = Rate at which distance changes over time. S = D/t </li></ul><ul><li>Velocity = speed with direction V = D/t with a direction (right, left, north, south, negative, positive) </li></ul>
  7. 9. Example <ul><li>A bus moves a distance of 150 m East in 10 seconds. </li></ul><ul><ul><li>What is the bus’s average speed? </li></ul></ul><ul><ul><li>What is the bus’s average velocity? </li></ul></ul><ul><ul><li>What are the passengers on the bus’s average velocity (assume no passengers are moving)? </li></ul></ul><ul><ul><li>If a passenger stands up and starts moving 1 m/s East, what is the passengers total velocity? </li></ul></ul><ul><ul><li>If another passenger stands up and starts moving 1 m/s West what is the passengers total velocity? </li></ul></ul>
  8. 10. <ul><li>S = 150 m/10 s Speed = 15 m/s </li></ul><ul><li>V = 150 m/10 s Velocity = 15 m/s East </li></ul><ul><li>Passengers on the bus move at the same rate as the bus as long as it is not moving. (15 m/s East) </li></ul>D. 15m/s East + 1 m/s East = 16 m/s East E. 15 m/s East – 1 m/s West = 14 m/s East
  9. 11. Acceleration <ul><li>The rate at which velocity changes over time </li></ul><ul><li>Avg Acceleration = Final Velocity – Starting Velocity </li></ul><ul><li> time it takes to change velocity </li></ul>What is the bicyclist’s acceleration?
  10. 13. Velocity Versus Time Graph <ul><li>What is happening from 0 seconds to 8 seconds? </li></ul><ul><li>What is happening from 8 to 10 seconds? </li></ul><ul><li>What happens at exactly 8 seconds? </li></ul><ul><li>What happens to this person’s position from 0 –10 seconds? </li></ul>
  11. 14. Circular Motion <ul><li>Objects moving in circle always change direction, velocity, and acceleration </li></ul>Black arrow indicates direction of motion and velocity. Blue arrow indicates acceleration.

×