2ObjectivesDescribe 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.
4This Graph Shows No Velocity 1.ConstantNo VelocityIncreasing2.3.Answer Now123456789101112131415161718192021222324252627282930
5What is the distance a man can run in 1 hour if he runs at 7 mi/hr? 7 km7 m7 miAnswer Now123456789101112131415161718192021222324252627282930
6What is the Velocity of a Plane that Travels 500 mi in 1 hour 500m/s500 mi/hr500 km/hrAnswer Now123456789101112131415161718192021222324252627282930
7Using 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
8final velocity – initial velocity AccelerationAcceleration = change in velocity divided by the time interval in which the change occurred.Acceleration =a =final velocity – initial velocitytimevf – vit
9UnitsAcceleration = Vf – V itUnits = m or ms s * s
10Acceleration Acceleration = rate at which velocity changes over time Quick time movie accelerationAcceleration occurs when there's a change inSpeedDirectionOr both change
11Uniform circular motion is constant acceleration. QT Centripetal AccelerationVideo of bucket and water having centripetal acceleration
12Acceleration Acceleration can be determined from a graph QT Graphical Representations of Accelerations
13Acceleration can also be determined from a velocity-time graph A straight line with slope = constant accelerationSlope of the line = acceleration
14Horizontal line = constant speed, no acceleration or deceleration.
16A negative slope indicates that an object is slowing down or decelerating.
17Calculating 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
18The 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:
19A 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:
20In what direction is the car accelerating? How can you tell mathematically?
21A 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:
22A 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 =