speed and acceleration
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Speed and Acceleration. By: Ryan Pedrigi Resident Scientist/Mathematician. What is speed?. A way of describing “how fast” something is moving. More technically, speed is the rate of change of an objects position with respect to time. Calculation of Speed. - PowerPoint PPT PresentationTRANSCRIPT
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Speed and AccelerationBy: Ryan Pedrigi
Resident Scientist/Mathematician
![Page 2: Speed and Acceleration](https://reader030.vdocuments.us/reader030/viewer/2022032612/56812d1f550346895d921c0a/html5/thumbnails/2.jpg)
What is speed?
A way of describing “how fast” something is moving.
More technically, speed is the rate of change of an objects position with respect to time.
![Page 3: Speed and Acceleration](https://reader030.vdocuments.us/reader030/viewer/2022032612/56812d1f550346895d921c0a/html5/thumbnails/3.jpg)
Calculation of Speed There are a couple of different ways to
calculate speed Average speed, S, is simply the change
in position, x, divided by the time, t, taken to travel that distance…
IF
IF
tt
xx
t
xS
Maximum Speed = 62 mph
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Applications of Speed: British Thrust SSC
Max Speed = 763 MPH
![Page 5: Speed and Acceleration](https://reader030.vdocuments.us/reader030/viewer/2022032612/56812d1f550346895d921c0a/html5/thumbnails/5.jpg)
Applications of Speed: Supersonic Flight Max Speed = 1650 MPH (Mach 2.2)
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Applications of Speed: Sky Diver Terminal Velocity = 200 MPH
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Sample Problem: Speed A runner runs a
400 meter race in a time of 50 seconds.What is her average speed?
s
mS
tt
xxS
IF
IF
050
0400
smS 8
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What is Acceleration?
A way of describing how fast something is speeding up or slowing down.
More technically, acceleration is the rate of change of an objects speed with respect to time.
![Page 9: Speed and Acceleration](https://reader030.vdocuments.us/reader030/viewer/2022032612/56812d1f550346895d921c0a/html5/thumbnails/9.jpg)
Calculation of Acceleration As with speed, there are a couple of
different ways to calculate acceleration Average acceleration, a, is simply the
time rate of change of speed, S,…
IF
IF
tt
SS
t
Sa
![Page 10: Speed and Acceleration](https://reader030.vdocuments.us/reader030/viewer/2022032612/56812d1f550346895d921c0a/html5/thumbnails/10.jpg)
Applications of Acceleration: Lamborghini
Accel. = 15.38 MPH/sec = 22.56 ft/sec^2Engine: 6 liter, V12
Horsepower: 550 @ 7100 RPMMaximum Speed: 210 MPH0-60: 3.9 sec0-100: 8.8 secPrice: $275,000
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Applications of Acceleration: Space Shuttle Accel. = 64.87 MPH/sec = 95.14
ft/sec^2Speed Attained: > 17,500 MPHTime to Low Orbit: 11 min.Time to Space: 45 min.
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Sample Problem: Acceleration
A motorcycle turns the corner of a race track at 85 MPH and then speeds up to 150 MPH on the straightaway. Knowing that it took 5 seconds to change speed, what is the average acceleration?
sMPH
att
SSa
IF
IF
05
85150
sMPHa 13