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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.

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Presentation on theme: "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."— Presentation transcript:

1 Day 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? A t x t This graph shows CONSTANT ACCELERATION. The object must be speeding up or slowing down

2 Acceleration Formula used to calculate acceleration Delta means “change in” Units are length/time squared EX: mssmss km hr mi hr s ms2ms2

3 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

4 Acceleration Triangle (reference section) ΔVΔV Change in Velocity AT AccelerationTime COVER what You are looking for

5 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:

6 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:

7 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:

8 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. 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. Looking for: Given: Formula: Solution:

9 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:

10 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:

11 t = V f -V i a V f = V i + at V i = V f - at a = Vf – Vi t ACCELERATIONACCELERATION #1 #2 #3 #4 PUT IN REFERENCE SECTION


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