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©
2000
V
ERNIER
S
OFTWARE
&
T
ECHNOLOGY
G
ETTING
S
TARTED WITH THE
CBR 2™
S
ONIC
M
OTION
D
ETECTOR
21
Activity 3—A Speedy Slide
(cont.)
Parabolic
Ð
Determine the slider’s speed.
a. After data collection stops and a graph of distance versus
time is displayed, select
Plots
(press
p
).
b. Press 2 to select
2: Vel vs Time
to display velocity versus time.
c. Use
~
to examine data points along the graph. As you move the cursor right and
left, the time (X) and velocity (Y) values of each data point are displayed above the
graph. The highest point on the graph corresponds to the highest speed of the
slider. Record this highest speed in the Data table. Round to the nearest 0.01 m/s.
(In the example to the right, the highest speed is 2.00 m/s.)
d. Select
Main
(press
r
) to return to the main screen.
Ñ
Repeat Steps 4–7 two more times.