C
OPYING PERMITTED PROVIDED
TI
COPYRIGHT NOTICE IS INCLUDED
26
G
ETTING
S
TARTED WITH
CBR
© 1997 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
Activity 4—Bouncing ball
parabolic
Data collection
➊
Begin with a test bounce. Drop the ball (do not throw it).
Hints:
Position the
CBR
at least 0.5 meters (1.5 feet) above the height of the highest
bounce. Hold the sensor directly over the ball and make sure that there is nothing in the
clear zone
(see page 7).
➋
Run the
RANGER
program (see page 5 for keystrokes for each calculator).
➌
From the
MAIN MENU
choose
APPLICATIONS
. Choose
METERS
or
FEET
.
➍
From the
APPLICATIONS
menu choose
BALL BOUNCE
. General instructions are displayed.
BALL BOUNCE
automatically takes care of the settings.
➎
Hold the ball with arms extended. Press
›
. The
RANGER
program is now in Trigger
mode. At this point, you may detach
CBR
from the calculator.
➏
Press
¤
. When the green light begins flashing, release the ball, and then step
back. (If the ball bounces to the side, move to keep the
CBR
directly above the ball, but
be careful
not
to change the height of the
CBR
.)
You can hear a clicking sound as the data is collected. Data is collected for time and
distance, and calculated for velocity and acceleration. If you have detached the
CBR
,
reattach it when data collection is finished.
➐
Press
›
. (If the plot doesn’t look good, repeat the sample.) Study the plot.
Answer
questions 1 and 2 on the activity sheet.
➑
Observe that
BALL BOUNCE
automatically flipped the distance data.
Answer
questions 3 and 4
.