1 / 25

Motion, Speed, Velocity, and Acceleration

Motion, Speed, Velocity, and Acceleration. Nadia Reese 6 th grade science. Motion. Motion - when an object changes its position relative to a reference point. In order to know something has moved, you need to know the point from where it started. Distance.

deo
Download Presentation

Motion, Speed, Velocity, and Acceleration

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. Motion, Speed, Velocity, and Acceleration Nadia Reese 6th grade science

  2. Motion • Motion- when an object changes its position relative to a reference point. • In order to know something has moved, you need to know the point from where it started.

  3. Distance • Distance – how far an object has moved. • The SI unit of length is the meter (m). • Longer distances are measured in kilometers (km). • Shorter distances are measured in centimeters (cm).

  4. Time Time -an instance or single occasion for some event. The SI unit of time is the second (s). Other units for time are the minute, hour, days, years, etc…

  5. Speed • Speed – the distance an object travels divided by how long it took (time). 37.5 km/hr

  6. Instantaneous Speed The speed at a particular point in time. Example-speedometer in car.

  7. Constant Speed Means that the speed of the object under consideration on NOT changing. Example-cruise control

  8. Average Speed TOTAL distance traveled divided by the total time it took. EXAMPLE: Trip from El Paso to Las Cruces.

  9. Velocity • Velocity– the distance an object travels divided by how long it took (time) in a certain direction. 37.5 Km/hr West

  10. Velocity • The velocity of an object can change even if the speed remains constant. • Ex. going around a curve in cruise control

  11. Calculating Speed/Velocity • V=d/t (distance divided by time) • V = Velocity (m/s) • d= distance (m) • t = time (s)

  12. Example 1 • A bicycle rider travels 60.0 km in 3.5 hours. What is the cyclist’s average speed?

  13. Example 2 • What is the average speed of the car that traveled a total of 300.0 miles in 5.5 hours?

  14. Graphing Motion • A distance-time graph makes it possible to display the motion of an object over a period of time. • The slope of the line represents the speed. The steeper the slope, the faster the speed. • The horizontal line means that the velocity is zero. • Distance is always plotted on the y- axis and time is always on the x-axis.

  15. Distance-Time Graph

  16. Distance-Time Graph

  17. Distance-Time Graph

  18. Distance-Time Graph

  19. Distance-Time Graph

  20. Distance-Time Graph Questions • What is the speed at B-C? ____________ • How far did the car drive before it stopped the first time? _________ • How far did the car drive the whole trip? ___________ • How long did the whole trip take? __________ • What is the car’s average speed? ___________

  21. Velocity-Time Graph

  22. Acceleration Acceleration is the rate of change in velocity. When the velocity of an object changes, the object accelerates. Acceleration occurs when an object changes its speed, direction, or both. When an object increases it velocity it is called acceleration, when an object decreases its velocity it is called deceleration.

  23. Acceleration Formula a = Vf –Vi ------------- t Vf = final velocity (m/s) Vi = initial velocity (m/s) a = acceleration (m/s2) t = time (s)

  24. Example 1 A skateboarder is moving in a straight line at a speed of 3m/s and comes to a stop in 2s. What is the skateboarder’s acceleration?

  25. Example 2 A flying doughnut increases its speed from 30m/s to 145 m/s in 11.6 s. What is its acceleration?

More Related