1 / 17

SPEED

SPEED. Speed. Speed is the distance an object moves in a particular amount of time. OR How far you go and how long it takes to get there. How to find the speed of an object or a person:. Calculate Speed. Distance /Time (distance divided by time) Try some: calculate the speed. Answers.

michiko-hanabishi
Download Presentation

SPEED

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SPEED

  2. Speed • Speed is the distance an object moves in a particular amount of time. OR • How far you go and how long it takes to get there.

  3. How to find the speed of an object or a person:

  4. Calculate Speed • Distance /Time (distance divided by time) • Try some: calculate the speed

  5. Answers

  6. Average Speed • Most objects do not move at constant speeds for very long. • Race cars change speeds many times during the race: slower around the curves and faster on the straight places.

  7. Graphing Motion You can show the motion of an object on a line graph. Time is on the X-axis (horizontal) and distance is on the Y-axis (vertical). The 2 numbers are called coordinates of the point. Moving Man: http://www.mste.uiuc.edu/Murphy/MovingMan/MovingMan.html

  8. Graphing Constant Motion • Constant motion is motion that does not change. • That means the object is neither speeding up or slowing down. • Constant motion is shown as a straight line on a graph:

  9. Constant Motion Graph • This graph shows constant motion because the slope of the line does not change. • The slope of the line can be used to determine the speed of the object. • The change in distance for every minute on this graph is constant. • Speed = distance time • In this graph Speed = 2 m/min.

  10. Constant Motion continued • This graph also shows constant motion because the slope of the line does not change. • The slope of this line does not change either. • The distance on this graph stays the same. • Speed = d/t = 0/10 = 0 m/min • So what can be said about the motion? • The object is not moving.

  11. Change in Motion • When looking at a graph, you can tell when motion changes because line is not straight. • Change in motion can be seen as a change in the straight line or as a curved line.

  12. Change in Motion continued • In this graph, there are three different types of constant motion. • Motion is constant between minutes 0 and 4, 4 and 6, and 6 and 10. • Even though between these points motion is constant, the overall motion changes.

  13. Change in Motion continued • In this graph, the motion is not constant between any two points. • Motion is constantly changing. • The curve of this graph shows acceleration. • Acceleration is the increase or decrease in speed. • This graph shows increasing speed because the curve goes upward.

  14. Change in Direction • On a motion graph, you can tell when the object reverses direction because the distance from the starting point becomes less. • By looking at the slopes of the two lines, what can be said about the speed before compared to the speed after turning around? • The speed before turning around is quicker because the _______ is greater than after turning around. Slope

  15. Line graphs can show all kinds of information. • Look at the axis labels before you analyze the information.

  16. Time GraphConnect the dots and analyze the graph

  17. Analysis: Time Graph • This is a graph showing time for 2 runners in the 600 m race. It shows that George ran 2.5 minutes for the first lap, 3 minutes for the 2nd lap, 3.5 minutes for the 3rd lap, and 3 minutes for the 4th lap. Nina ran 3 minutes for the 1st, 3.5 for the 2nd, 3 for the 3rd, and 2.5 for the 4th. To calculate the average speed, take the total distance and divide by the total time. • George’s average speed: 50 m/min • Nina’s average speed: 50 m/min

More Related