The document discusses speed and motion. It provides examples of the fastest animals, humans, vehicles, and other objects. It discusses key concepts such as speed being the distance traveled over time. Motion is defined as relative based on the frame of reference. Speed, time, and distance are shown to have a direct relationship through equations. Constant and average speed are also explained.

1. MOTION

2. How speedy are
you?
Speed Trivia

3. Question #1
• What is the world’s fastest
animal?

4. Peregrine Falcon
• Top speed when in a hunting dive
• 200 mph or 322 km/hr

5. But…
Fastest land animal: cheetah
(70 mph, 113 km/h)
Fastest sea animal: sailfish
(up to 68 mph, 110 km/h)

6. Question #2
• What is the fastest speed a
human can run?

7. Usain Bolt
• World Record holder
• 100m = 9.58 sec (38 km/h, 23 mph)
http://www.youtube.com/watch?v=3nbjhpcZ9_g

8. Question #3
• What is the fastest car?

9. • Bugatti Veyron: 267 mph (441 km/h)
• 0-60 in 2.5 secs
• $1,700,000 (US)

10. Question #4
• How fast does a rain drop fall?

11. It depends…
• On size and weight of rain drop
• On wind resistance
• Average = 7 mph, 3 m/s

12. Question #5
•What is the fastest train?

13. Shanghai Airport Maglev
• 430km/h = ~269 mph

14. Question #6
• How fast is the speed of light?

15. 299,792 kilometers per second = 1,079,251,200 km/hr !!!
186,287 miles per second = 670, 633,200 mph
• A traveler, moving at the speed of light, would
circumnavigate the equator approximately 7.5
times in one second. By comparison, a traveler
in a jet aircraft, moving at a ground speed of 500
mph, would cross JUST the continental U.S.
once in 4 hours.
• It takes 499.0 seconds (8 min) for light to travel
from the Sun to the Earth

16. Question #7
• How fast does hair grow?

17. • Average 1.25
centimeters or 0.5
inches per month
• 15 centimeters or 6
inches per year
• Depends on age
and health

18. http://alt.coxnewsweb.com/ajc/swf/blueangels/blueangels.swf
SPEED
Back seat of an F-18

19. Question #8
• Is motion relative?
• Yes or No?
Are we ever really standing still?

20. Yes, All things are in motion.
• You may be perfectly still yet the
earth is spinning on its axis and
orbiting the sun.
• The sun orbits the center of the
galaxy, our galaxy and
Andromeda are moving toward
one another, most of the other
galaxies are moving away.

21. So to measure motion in a meaningful way,
we measure it relative to the observer or
another object we consider not to be moving.
When you pass a car on the highway
moving in the same direction, you
may be going 70mph, and the other
car 65mph. But your speed relative to
the other car is 5mph.
When the shuttle docks with the space
station the two orbiting objects approach one
another at a very slow speed relative to one
another, but both are orbiting at 17,000mph
relative to the surface of the earth.

23. •Motion is a change in position relative to
your surroundings.
•An object moves when it speeds up, slows
down or changes direction.
Main IDEAS

24. What’s a
Frame of
Reference?

26. BACKGROUN
D OR OBJECT
USED FOR
COMPARISON

27. SPEED rate at w/c an
object moves
Distance (D)
Speed =
Time (T)

28. d
ts
Another way to express this is in a “formula triangle” like this:

30. SPEED
IS….
InverselyInversely ProportionalProportional
toto TIMETIME
Greater speed, less time
Less speed, more time

31. DIRECTLY
PROPORTIONAL TO
DISTANCE

32. An ant crawled 12 inches
in 10 seconds. A second
ant crawled 24 inches in
10 seconds.
Compare the speed of the ants.

33. A plane flew 220 meters
in 1 second.
A second plane flew 220
meters in 2 seconds.
Compare their speeds.

34. DISTANCE
Length between two places
Distance = speed x time
D= ST
Expressed in km (1000m)

35. TIME
=
d
sT

36. CONSTANT SPEED
SPEED
THAT
DOES NOT
CHANGE

37. CONSTANT SPEED

38. STEPS IN PROBLEM
SOLVING
 STEP 1. Write the formula
 STEP 2. Substitute given
numbers and units
 STEP 3. Solve for the
unknown.

39. SAMPLE PROBLEM:
At what speed did a plane
fly if it traveled 1760
meters in 8 seconds?

40. SOLUTION
Step 1. Speed = Distance/Time
Step 2. Speed = 1760 meters/ 8sec
Step 3. Speed = 220 m/sec

41. SAMPLE
PROBLEMS:1. A car travels 240 kilometers in
3 hours. What is the speed of the
car during that time?
ANSWER: S= d/t S= 240 km/3 hr
80 Km/Hr

42. The speed of a
cruise ship is 50
km/hr. How far will
the ship travel in
14 hours?
Answer: D = ST 700 km

43. AVERAGE SPEED
TOTAL DISTANCE / TOTAL TIME
AVERAGE total distance traveled
SPEED time
=

44. AVERAGE SPEED

45. A car travels 200 m in
10 seconds. What is
the average speed of
the car?
ANSWER: Ave speed= total d/total time
= 200m/10s
20 m/s

46. Definitions:
A change in position in a certain amount of time is __________.
__________________ is the rate at which an object moves and
is determined by dividing ____________ by _____________.
_________________________ is speed that does not change.
_________________________ is calculated by dividing the
total distance by the total time.