Definitions
A way to describe how an object is moving
Speed
A person training for a marathon runs 20 miles in 4 hours. What was their average speed?
5 mph
What does the slope of a motion graph tell you?
speed of the object
If you move 50 meters in 10 seconds, what is your speed?
5 meters per second
Explain how you can calculate the speed of a shark.
you can track the sharks distance traveled over time and calculate speed doing distance/time
What is the speed equation?
average speed = distance / time
Ani runs (500 feet) in 5 seconds during practice. What was his average speed?
100 ft per second
What variable is on the x axis?
time
How is speed different from velocity?
Velocity has direction!
Explain how you can calculate the distance of a shark given a speed and time.
Speed x time = distance
Describes an object’s speed AND direction
velocity
It takes Serina 0.25 hours to drive to school. Her route is 16 km long. What is Serina’s average speed on her drive to school?
64 km/hr
Josh graphed the distance and time for his super fast car. His slope was steeper than the slope of Abby's graph. Is Josh's car faster or slower than Abby's?
FASTER!
Why might velocity be important in some situations? Jobs?
pilots for example need to know what direction they are moving in!
Explain the point of the buggy lab we did...
figure out the speed of the buggy and make a motion graph to explain its movement or motion
A graph that can tell you some basic information about what an object was doing
Motion graph
You need to get to class, 200 meters away, and you can only walk in the hallways at about 1.5 m/s. (if you run any faster, you’ll be caught for running). How much time will it take to get to your class?
133 seconds
What does a curved line on a motion graph tell you?
The object is speeding up or slowing down
Is speed or velocity more precise?
Velocity
How do we decide what distance unit to use for making speed measurements?
Depends on situation and how short/long we are going
rise over run
slope
If you shout into the Grand Canyon, your voice travels at the speed of sound (340 m/s) to the bottom of the canyon and back, and you hear an echo. If your echo takes 5.2 seconds to go from you, to the bottom of the canyon, and then back to you, how deep was the canyon?
1768 meters deep
Line A on my motion graph has a slope of 3. What does this number tell me about my object and its motion?
3 is the speed of my object
Use this data to make a motion graph. The left column is seconds and right is feet.
0 0
2 16
4 32
6 48
8 64
show miss schutz
What is the definition of speed?
a way to describe how an object is moving