Specifications

© 1997, 2004, 2006 TEXAS INSTRUMENTS INCORPORATED GETTING STARTED WITH THE CBR 2™ SONIC MOTION DETECTOR 29
Activity 5—Rolling Ball Parabolic
Data collection
Ê Answer question 1 on the activity sheet. Use the protractor to set the ramp at a 15°
incline. Lay the
CBR 2™ motion detector on the ramp and flip the sensor head so it is
perpendicular to the ramp.
Mark a spot on the ramp 15 centimeters (about six inches) from the
CBR 2™ motion
detector. Have one student hold the ball at this mark, while a second student holds the
calculator and
CBR 2™ motion detector.
Hints: Aim the sensor directly at the ball and make sure that there is nothing in the
clear zone (see page 7).
Ë Run the EasyData app or RANGER program.
Note: RANGER users should follow set up instructions on the screen.
Ì To set up the calculator for data collection using EasyData:
a. Select Setup (press p) to open the Setup menu.
b. Press 2 to select 2: Time Graph to open the
Time Graph
Settings
screen.
c. Select Edit (press q) to open the Sample Interval dialog
window.
d. Enter 0.1 to set the time between samples in seconds.
e. Select Next (press q) to advance to the Number of
Samples dialog window.
f. Enter 30 to set the number of samples. Data collection will
last for 3 seconds.