Specifications

Activity 4—Bouncing Ball Parabolic

Data collection

Ê Begin with a test bounce. Drop the ball (do not throw it).

Hints: Position the

CBR 2™ motion detector at least 0.5 meters (about 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).

Ë Run the EasyData application or RANGER program.

Ì EasyData Users: From the Setup menu, choose 4:Ball Bounce, and then select Start (press

q). General instructions are displayed. Ball Bounce automatically takes care of the

settings.

RANGER Users: From the Main Menu, choose 3: Applications. Choose the distance

units, then choose 3:Ball Bounce.

Í Have one person hold the calculator and CBR 2™ motion detector, while another

person holds the ball beneath the sensor.

Î Select Start (press q). When the CBR 2™ motion detector begins clicking, release the

ball, and then step back. (If the ball bounces to the side, move to keep the

CBR 2™

motion detector directly above the ball, but be careful not to change the height of the

CBR 2™ motion detector.)

Ï When the clicking stops, the collected data is transferred to the calculator and a plot of

distance vs. time is displayed.

Ð If the plot doesn’t look good, select Main, Start, Start to repeat the sample. Study the

plot. Answer questions 1 and 2 on the activity sheet.

Ñ Observe that Ball Bounce automatically flipped the distance data. Answer questions 3

and 4.