1. Acceleration

2. Change in Velocity Acceleration- The rate of change of velocity.
You are at a stoplight and the light turns green so you step on the gas petal. How is the car’s speed changing? What happens to the speedometer?
You come to a stop sign and apply the brakes. How is your speed changing? What happens to the speedometer?
Acceleration- The rate of change of velocity.

3. A Change in velocity can be either:
A change in speed OR
A change in direction
A merry-go round is running at a constant speed.
What is happening to the velocity? Why?
Is there acceleration? Why?

4. acceleration= final velocity- initial velocity
time
a = (vf – vi) t

5. Calculate the acceleration for this problem in your notes.
A car traveling at 6 m/s accelerates to
9 m/s in 3 seconds. What is the
car’s acceleration?
Calculate the acceleration for this problem in your notes.

6. Calculate the rest of the acceleration problem in your notes
A car traveling at 6 m/s slams on the breaks to
avoid hitting a deer. The car comes to a safe stop
6 seconds after applying the breaks. What is the
car’s acceleration?
vf - vi = a
time
0 m/s – 6m/s =
6 seconds
Calculate the rest of the acceleration problem in your notes

7. Positive acceleration Negative acceleration