acceleration, speed, and velocity
DESCRIPTION
Acceleration, Speed, and Velocity. Acceleration. Acceleration is a change in velocity by Changing speed : Starting Stopping Speeding up Slowing down Or changing direction. Acceleration. Acceleration can be positive or negative Speeding Up – Positive acceleration (+) - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/1.jpg)
Acceleration, Speed, and Velocity
![Page 2: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/2.jpg)
AccelerationAcceleration is a change in
velocity by Changing speed:
▪ Starting▪ Stopping▪ Speeding up▪ Slowing down
Or changing direction
![Page 3: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/3.jpg)
Acceleration Acceleration can be positive or negative
Speeding Up – Positive acceleration (+) Slowing Down – Negative acceleration (-)
Units – measured in m/s2
Acceleration is caused by unbalanced forces Calculating Acceleration:
Final Speed – Initial Speed Time
![Page 4: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/4.jpg)
Speed A way to describe motion.
Average speed - Rate of motion calculated by dividing the distance traveled by the amount of time it takes to travel that distance
Constant speed - Speed that does not change
Instantaneous speed - Speed of an object at any given time
Units: Measured in m/s
![Page 5: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/5.jpg)
Instantaneous vs. Average Speed
![Page 6: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/6.jpg)
What is the formula used to calculate speed?
![Page 7: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/7.jpg)
Speed is calculated by dividing distance by time.
What is the formula for calculating speed?
Distance Time
Speed =
![Page 8: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/8.jpg)
Calculating SpeedGiven Distance & Time
Divide Distance by TimeDistance ÷ Time = SpeedSpeed = Distance ÷ Time
![Page 9: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/9.jpg)
Calculating DistanceGiven Speed & Time
Multiply Speed and TimeDistance = Speed X TimeSpeed X Time = Distance
![Page 10: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/10.jpg)
Calculating TimeGiven Distance and Speed
Divide Distance by TimeDistance ÷ Speed = TimeTime = Distance ÷ Speed
![Page 11: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/11.jpg)
Calculate this Speed
A football field is about 100 m long. If it takes a person 20 seconds to run its length, how fast was the football player running?
![Page 12: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/12.jpg)
A football field is about 100 m long. If it takes a person 20 seconds to run its length, how fast was the football player running?
Speed = Distance ÷ Time
Speed = 100 m ÷ 20 sSpeed = 5 m/s
Remember to include
the UNITS!!
Calculate this Speed:
![Page 13: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/13.jpg)
Velocity Velocity is speed with direction Calculating velocity is the same as
calculating speed (distance/time). The difference is that velocity is what
physicists call a vector. There must be direction.
Speed = 3 m/s Velocity = 3 m/s, heading northeast
Velocity = Final Distance – Initial Distance Final Time – Initial TimeVelocity = Final Distance – Initial Distance Final Time – Initial Time
![Page 14: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/14.jpg)
Distinguish between Speed and VelocitySpeed describes distance and time
Velocity describes distance, time, and direction
You can say the top speed of an airplane is 300 kilometers per hour (kph). But its velocity is 300 kph in a northeast direction.
![Page 15: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/15.jpg)
Let’s PracticeWhich of the following sentences contain an example of velocity and which contain an example of speed?
A. Five seconds into the launch, the rocket was shooting upward at 5000 meters per second.
B. Cheetahs can run at 70 miles per hour.
C. Moving at five kilometers per hour, it will take us eight hours to get to the base camp.
D. The car covered 500 kilometers in the first 10 hours of its northward journey.
E. Roger Bannister was the first person to run one mile in less than four minutes.
Velocity
VelocitySpeed
Speed
Speed
![Page 16: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/16.jpg)
Summarizing Podcast
![Page 17: Acceleration, Speed, and Velocity](https://reader034.vdocuments.site/reader034/viewer/2022050910/56815c3d550346895dca39f9/html5/thumbnails/17.jpg)
Velocity
TimeDistance
m/s
m/s2
Speed
Acceleration
Direction
• Time• m/s• m/s north• m/s2
• Distance• Direction
m/s north