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## Acceleration

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**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.”