1. Velocity & Acceleration

2. I. What is Velocity? Speed in a given direction. Units Include:
1. mph east
2. m/s left
C. Must have a direction – otherwise it is just a speed.

3. II. Acceleration A. An object changing its Velocity.
B. An object changing its direction.
What is the formula for Acceleration?
Think about velocity & time.

4. C. Acceleration Formula
1. Vf = Velocity final
2. Vi = Velocity initial (starting speed)
T = time over which the change in speed occurs.

5. Calculating Acceleraton
Write the formula
Plug-in the numbers & units
Calculate number & round-off
Record new units
No Units Cancel

6. Practice Example What is the acceleration a of a car?
If the initial velocity is 0 m/s
Final velocity is 31.0 m/s
What is the acceleration after 20 seconds have passed?  

7. The Solution Note the 3-step process Units m/s2 Units m/s/s
What does this mean?
Every second the car is going 1.55 m/s faster than before.

8. Graphing Acceleration

9. Acceleration Simulation