Presentation is attached below
I. Acceleration A. Acceleration: the change in velocity over time B. Examples 1. a ball rolling down a hill picks up speed (acceleration) 2. a ball rolling down a steep hill picks up speed faster (more acceleration) 2. a ball starting to go up a hill slows down (deceleration) 3. a ball on a flat surface will keep rolling (zero acceleration) C. Formula acceleration = change in velocity/time or (final velocity-initial velocity)/time acceleration = a final speed = vf initial speed = vi time = t II. Examples Ex1 Initial velocity is 3 m/s, initial velocity is 12 m/s. Time it took to change velocity is 3 seconds. What is the acceleration? (12 m/s - 3 m/s) / 3 s = 3
m/s2 Ex2 A car moving at 35 m/s sees an old lady and hits the brakes. It slows down to 15 m/s in 5 seconds. Calculate the acceleration. (15 m/s – 35 m/s) / 5 s = -4 m/s2 Ex3 A cyclist going 10 m/s accelerates at 4 m/s2 for 3 seconds. What is his final speed? Solve either using a timeline or changing the formula to solve for final speed: 22 m/s Attachments Acceleration Practice Problems - practice problems for mastering acceleration Acceleration - class presentation with notes on acceleration |
