1. Acceleration
by Mr. Krall

2. What is acceleration?

3. Acceleration tells how quickly an object changes velocity.

4. When the voice on a commercial says a sports car… “Goes from zero to 60 in 3 seconds.” That’s acceleration.

5. Acceleration causes the feeling you get when the roller coaster starts dropping down the big hill.

6. Acceleration tells if something will “stop on a dime” or “grind to a halt.”

7. How much longer until we are going the speed limit?
When the bus driver steps on the gas and the bus s l o o o w ly gets up to speed. That’s a low acceleration.
How much longer until we are going the speed limit?
Zip it, kid.
Zip it, kid.
AAAAAHHHH!!
HELP US!
UNLIKELY
TYPICAL

8. The formula for acceleration is:
the velocity the object is going at the end (VFINAL) – the velocity the object was going when it started (VINITIAL)
the amount of time the object was accelerating (T)
= acceleration (A)
VFINAL – VINITIAL T
= A

9. The number you get from an acceleration problem answers this question: “How much does the object’s velocity change for each unit of time that passes?”

10. 5 miles/hour /second So an acceleration of 5 miles/hour/second means:
the objects’ velocity increases by 5 miles/hour.”
“For every second that goes by,