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**Day 14 11-9-10 Topic: Acceleration Formula**

Objective: I will solve problems with proper formula and template. Science Starter: What would the X-t graph of this A-t graph look like? This graph shows CONSTANT ACCELERATION. The object must be speeding up or slowing down A t x t

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**Acceleration Formula used to calculate acceleration**

Delta means “change in” Units are length/time squared m s m s2 km hr mi hr s EX:

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**Explaining the f and the i**

The f stands for “final” or the ending velocity f = final velocity The i stands for the “initial” or starting velocity i= initial velocity

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**Acceleration Triangle (reference section)**

ΔV Change in Velocity A T Acceleration Time COVER what You are looking for

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1. A parachute on a racing dragster opens and changes the speed of the car from 65 m/sec to 35 m/sec in a period of 2.5 seconds. What is the acceleration of the dragster? Looking for: Given: Formula: Solution:

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2. The cheetah, which is the fastest land mammal, can accelerate from 0.0 mi/hr to 50.0 mi/hr in 2.5 seconds. What is the acceleration of the cheetah? Give your answer in units of mph/sec. Looking for: Given: Formula: Solution:

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**3. The Ford Edge sports car can accelerate from 0. 0 km/hr to 75**

3. The Ford Edge sports car can accelerate from 0.0 km/hr to 75.6 km/hr in 3.0 seconds. What is the acceleration of this car? Give your answer in units of kilometers per hour/sec. Looking for: Given: Formula: Solution:

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**4. Which has greater acceleration, the cheetah or the Ford Edge**

4. Which has greater acceleration, the cheetah or the Ford Edge? (To figure this out, you must remember that there are 1.6 kilometers in 1 mile.) Be sure to show your calculations. Looking for: Given: Formula: Solution: 4. Which has greater acceleration, the cheetah or the Lamborghini Diablo? (To figure this out, you must remember that there are 1.6 kilometers in 1 mile.) Be sure to show your calculations.

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Challenge (multi step) 1.If a car can go from 0.0 to 60.0 mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50.0 mi/hr? Looking for: Given: Formula: Solution:

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**2. A cart rolling down an incline for 5**

2. A cart rolling down an incline for 5.0 seconds has an acceleration of 4.0 m/sec2. If the cart has a beginning speed of 2.0 m/sec, what is its final speed? Looking for: Given: Formula: Solution:

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**PUT IN REFERENCE SECTION**

#1 A C E L R T I O N a = Vf – Vi t #2 t = Vf-Vi a Vf = Vi + at Vi = Vf - at PUT IN REFERENCE SECTION #3 #4

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