Acceleration Video Lecture Calculating average velocity when acceleration
- Slides: 13
Acceleration Video Lecture Calculating average velocity when acceleration is constant Video Lecture
Acceleration Ü Acceleration- The change in speed or direction of an object. Acceleration is a vector quantity, just like displacement and velocity. imagecache 2. allposters. com/images/pic/B
Changes in Speed Ü An increase in speed gives a positive acceleration. Ex: Your car accelerates from a stop sign. cache. viewimages. com/xc/52663141. jpg? v =1&c=Vi. . .
Changes in Speed ÜA decrease in speed is a negative acceleration or a deceleration. A car that hits a tree has a very sudden negative
Free Fall Ü Free Fall- the movement of an object toward Earth because of gravity. You drop a ball out the window, the ball is in free fall. images. jupiterimages. com/. . . /18/56/22575
Acceleration due to gravity Ü The acceleration due to gravity is 9. 8 m/s 2 every second. That means that every second the object is falling it’s speed increases by 9. 8 m/s It is often written as 9. 8 m/s 2 Ex: The 1 st second an object is falling its speed in 9. 8 m/s. The 2 nd second its speed in 19. 6 m/s
Changes in Direction ÜA change in direction can also cause a change in acceleration. A bike riding around a turn with a constant speed has a change of
Changes in Speed and Direction Ü Objects like a roller coaster often change both speed and direction at the same time Ü This is obviously a change in acceleration. Ü www. jaunted. com/files/3873/Stealth_Ride. jpg
Calculating Acceleration Ü Acceleration = Change in Velocity / Total Time Often written as (Vf – Vi) / t
Graphing Acceleration Ü The slope of a speed time graph is acceleration Ü The following graph show a positive constant acceleration. Ü electron 9. phys. utk. edu/. . . /images/Image 1331. gif
Graphing Acceleration Ü The following graph shows a positive increasing acceleration. Ü www. stvincent. ac. uk/. . . /speed/images/incacc. gif
Graphing Acceleration ÜThe following graph shows a negative acceleration. Ü www. stvincent. ac. uk/. . . /images/constdec. gif
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