2 ObjectivesDescribe the concept of acceleration as a change in velocity.Explain why circular motion is continuous acceleration even when the speed does not change.Calculate acceleration as the rate at which velocity changes.Graph acceleration on a velocity-time graph.
3 This Graph Shows Constant Velocity 2.ConstantIncreasingNo Velocity1.3.Answer Now123456789101112131415161718192021222324252627282930
4 This Graph Shows No Velocity 1.ConstantNo VelocityIncreasing2.3.Answer Now123456789101112131415161718192021222324252627282930
5 What is the distance a man can run in 1 hour if he runs at 7 mi/hr? 7 km7 m7 miAnswer Now123456789101112131415161718192021222324252627282930
6 What is the Velocity of a Plane that Travels 500 mi in 1 hour 500m/s500 mi/hr500 km/hrAnswer Now123456789101112131415161718192021222324252627282930
7 Using the Conservation of Momentum if car has the momentum of 50 kg Using the Conservation of Momentum if car has the momentum of 50 kg*m/s and a man is in the moving car the man has?50 m/s50 kg50 kg * m/sAnswer Now123456789101112131415161718192021222324252627282930
8 final velocity – initial velocity AccelerationAcceleration = change in velocity divided by the time interval in which the change occurred.Acceleration =a =final velocity – initial velocitytimevf – vit
9 UnitsAcceleration = Vf – V itUnits = m or ms s * s
10 Acceleration Acceleration = rate at which velocity changes over time Quick time movie accelerationAcceleration occurs when there's a change inSpeedDirectionOr both change
11 Uniform circular motion is constant acceleration. QT Centripetal AccelerationVideo of bucket and water having centripetal acceleration
12 Acceleration Acceleration can be determined from a graph QT Graphical Representations of Accelerations
13 Acceleration can also be determined from a velocity-time graph A straight line with slope = constant accelerationSlope of the line = acceleration
14 Horizontal line = constant speed, no acceleration or deceleration.
16 A negative slope indicates that an object is slowing down or decelerating.
17 Calculating Acceleration Acceleration is the rate at which velocity changes.Acceleration Equation (for straight-line motion)QT Distinguishing B/W Velocity and AccelerationQT Average AccelerationSI Units = m/s2
18 The Top Thrill Dragster at Cedar Point goes from 0 m/s to 53 The Top Thrill Dragster at Cedar Point goes from 0 m/s to 53.6 m/s (120 mph) in 4 seconds. What is its acceleration?Given:a =Vf =V i =t =Algebra:Substitution:
19 A car traveling home at a velocity of 15 A car traveling home at a velocity of 15.6 m/s slams on its brakes and comes to a stop to avoid a dog. If it takes 5 seconds to stop, what is the cars acceleration?Given:a =Vf =V i =t =Algebra:Substitution:
20 In what direction is the car accelerating? How can you tell mathematically?
21 A Porsche Boxster has an acceleration of 4. 51 m/s2 A Porsche Boxster has an acceleration of 4.51 m/s2. If the car starts from rest how much time would it take for the vehicle to reach a speed of 11.3 m/s?Given:a =Vf =V i =t =Algebra:Substitution:
22 A golf ball thrown from the top of the sears tower accelerates at 9 A golf ball thrown from the top of the sears tower accelerates at 9.8 m/s2 toward the ground and lands on the pavement 9.2 seconds. If the ball’s final speed is 93.0 m/s what was the speed with which the ball was initial thrown?Algebra:Substitution:Given:a =Vf =V i =t =
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