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©
1997,
2004,
2006
T
EXAS
I
NSTRUMENTS
I
NCORPORATED
G
ETTING
S
TARTED WITH THE
CBR 2™
S
ONIC
M
OTION
D
ETECTOR
17
Activity 2—Match the Graph
Name
___________________________________
Data collection
1.
What physical property is represented along the x-axis? _____________________________________
What are the units?
How far apart are the tick marks? ________________
What physical property is represented along the y-axis? _____________________________________
What are the units?
How far apart are the tick marks? ________________
2.
How far from the
CBR 2™
motion detector do you think you should stand to begin? ____________
3.
Did you begin too close, too far, or just right? _____________________________________________
4.
Should you walk forward or backward for a segment that slopes up? _________________________
Why?
_______________________________________________________________________________
5.
Should you walk forward or backward for a segment that slopes down? _______________________
Why?
_______________________________________________________________________________
6.
What should you do for a segment that is flat? ____________________________________________
Why?
_______________________________________________________________________________
Explorations
7.
If you take one step every second, how long should that step be? ____________________________
8.
If, instead, you take steps of 1 meter (or 1 foot) in length, how many steps must you take? _______
9.
For which segment will you have to move the fastest? ______________________________________
Why?
_______________________________________________________________________________
10.
For which segment will you have to move the slowest? _____________________________________
Why?
_______________________________________________________________________________
11.
In addition to choosing whether to move forward or backward, what other factors entered into
matching the graph exactly? ____________________________________________________________
____________________________________________________________________________________
12.
What physical property does the slope, or steepness of the line segment, represent? ____________
13.
For the first line segment, how many meters must you walk in how many seconds? _____________
14.
Convert the value in question 13 (the velocity) to meters
à
1 second: ___________________________
Convert to meters
à
minute: _____________________________________________________________
Convert to meters
à
hour: _______________________________________________________________
Convert to kilometers
à
hour: ____________________________________________________________
15.
How far did you actually walk? _________________________________________________________