1. Activator Define acceleration in your own words.
Give an example of when you have experienced acceleration in your life.

2. a Acceleration vf - vi t The rate of change of velocity
Change in velocity over a change in time
Unit of distance / (unit of time)2
(m/s)/s = m/s2
vf - vi
change in velocity
vf - vi a
acceleration = t
time a t

3. Acceleration

4. Acceleration
Acceleration is not only an increase, but also a decrease in velocity
Three ways to accelerate
Speed up – positive acceleration
Slow down – negative acceleration
Change direction – you can feel this acceleration as you turn a corner in a car – your body is being “pushed” toward the outside of the curve

5. Acceleration

6. Rearrange the equation
Q: a F:
I: vf vi Ra: t

7. Rearrange the Equation
Q: t F: I: vf vi Ra: a

8. 1. You are interested in a new sports car that can go from 0 m/s to 120 m/s in 12 s. What is the acceleration of the car? Q Ra I C F

9. 2. What is the acceleration of a vehicle that changes its velocity from 100 m/s to a dead stop in 10s? Q Ra I C F

10. 3. During a race, a sprinter increases from 5. 0 m/s to 7
3. During a race, a sprinter increases from 5.0 m/s to 7.5 m/s over a period of 1.25s.  What is the sprinter’s average acceleration during this period?
Q Ra
I C F

11. 4. A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?
Q Ra
I C F

12. 5. A car traveling at 7. 0 m/s accelerates 2
5. A car traveling at 7.0 m/s accelerates 2.5 m/s2 to reach a speed of 12.0 m/s. How long does it take for this acceleration to occur?
Q Ra
I C F

13. 6. You are traveling in a car that is moving at a velocity of 20 m/s
6. You are traveling in a car that is moving at a velocity of 20 m/s. Suddenly, a car 10 meters in front of you slams on its brakes. At that moment, you also slam on your brakes and slow to 5 m/s. Calculate the acceleration if it took 2 seconds to slow your car down.
Q Ra
I C F

14. 7. A lizard accelerates from 2 m/s to 10 m/s in 4 seconds
7. A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. What is the lizard’s average acceleration? Q Ra I C F

15. 8. A car starts from a stoplight and is traveling with a velocity of 10 m/s east in 20 s. What is the acceleration of the car? Q Ra I C F

16. 9. A ball rolls down a ramp for 15 s
9. A ball rolls down a ramp for 15 s. If the initial velocity of the ball was 0.8 m/s and the final velocity was 7 m/s, what was the acceleration of the ball? Q Ra I C F

17. 10. A meteoroid changed velocity from 1 km/s to 1. 8 km/s in 0. 03 s
10. A meteoroid changed velocity from 1 km/s to 1.8 km/s in 0.03 s. What is the acceleration of the meteoroid? Q Ra I C F

18. 11. The space shuttle releases a space telescope into orbit around the Earth. The telescope goes from being stationary to traveling at a speed of 1700 m/s in 25 s. What is the acceleration of the telescope? Q Ra I C F

19. 12. A ball is rolled at a velocity of 12 m/s
12. A ball is rolled at a velocity of 12 m/s. After 36 seconds, it comes to a stop. What is the acceleration of the ball?
Q Ra I C F