Acceleration by Mr. Krall
When the voice on a commercial says a sports car… “Goes from zero to 60 in 3 seconds.” That’s acceleration.
Acceleration causes the feeling you get when the roller coaster starts dropping down the big hill.
Acceleration tells if something will “stop on a dime” or “grind to a halt.”
When the bus driver steps on the gas and the bus s l o oo w lygets 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
VFINAL –VINITIAL =A T 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)
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?”
So an acceleration of 5 miles/hour/second means: 5 miles/hour /second “For every second that goes by, the objects’ velocity increases by 5 miles/hour.”