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Instruction Manual
Drop Shoot
Accessory
Model No. ME-9859
Manual No. 012-08719
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Model No. ME-9859
Warranty
For a description of the product warranty, see the
warranty description in the PASCO catalog.
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Model No. ME-9859 Drop Shoot Accessory
Drop Shoot Accessory
Model No. ME-9859
Equipment List
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Included Equipment Replacement
1. Drop Shoot Bracket
2. 2.5 cm Steel Balls (2)
3. 2.5 cm Hollow Steel Ball
4. Mounting Hardware
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5
1
Part Number*
648-08601
699-064
699-158
5. Loading Rod
*Use Replacement Model Numbers to expedite replacement orders.
Additional Equipment Required
Projectile Launcher
C Clamp
Photogate Head
Time of Flight Acce ssory
Smart Timer
or Computer Interface
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648-08717
ME-6800 or ME-6801
SE-7285
ME-9498A
ME-6810
ME-9830
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Drop Shoot Accessory Model No. ME-9859
Introduction
PASCO's Drop Shoot Accessory is designed to demonstrate the
independence of motion in the x and y directions for a projectile. The
included bracket can be used with either the Short Range Launcher
(ME-6800) or Long Range Launcher (ME-6801). Mount a Photogate
to the bracket to determine the muzzle velocity of the ball as it leaves
the launcher. In addition, a Time of Flight Accessory can be used to
compare the time of freefall for both balls.
Independence of X and Y Motion
1. Mount the Projectile Launcher to a tabletop with a C clamp or
other table clamp.
2. Using the attached plumb bob, set the launch angle to 0º.
3. Slide the Drop Shoot Bracket into the groove on the bottom of the
Projectile Launcher.
4. Tighten the thumbscrew on the bottom to secure the bracket.
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Model No. ME-9859 Drop Shoot Accessory
5. Connect a photogate as shown to measure the initial speed of the
fired ball (optional). Since the photogate beam passes through the
center of the ball's path, the velocity of the ball is calculated by the
following equation:
velocity =
diameter of ball
"blocked time"
6. Place the Time of Flight Accessory directly below the Drop Shoot
Bracket.
7. Hang a solid steel ball from the magnetic screw.
8. Looking through the back of the launcher, adjust the magnetic
screw until the "hanging ball" is centered on the sights.
9. Remove the "hanging ball."
10. Place a solid steel ball into the barrel and use the included loading
rod to depress the plunger to the first click.
11. Replace the "hanging ball".
12. If velocity data is being collected with a photogate, click the Start
button in DataStudio.
13. Pull the launch cord to release the balls.
14. Mark the position the "hanging ball" when it strikes the ground.
15. Click Stop in DataStudio to end data collection.
16. Position the Time of Flight Accessory such that the hanging ball
will strike it and repeat the launch procedure.
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Drop Shoot Accessory Model No. ME-9859
17. Draw a force diagram for each ball as it flies through the air.
18. Based on these force diagrams, describe the motion of the balls in
the x direction.
19. Based on these force diagrams, describe the motion of the balls in
the y direction.
20. How does the time of free fall compare for the two balls? Explain.
Changing Launch Velocity
1. Repeat the above experiment, depressing the plunger of the launcher
to the "second click" instead of the "first click."
2. Draw a force diagram for each ball as it flies through the air.
3. Ask students to predict the horizontal range and time of free fall
for this new launch setting.
4. How does the horizontal range compare to the "first click" setting?
Explain.
5. How does the time of free fall compare to the "first c lic k" sett ing?
Explain.
6. What must be changed to affect the time of free fall?
7. If desired, repeat the experiment for the "third click."
Changing Mass
1. Repeat the above experiment, but hang the hollow steel ball instead
of the solid steel ball. Use the solid steel ball in the launcher.
2. Draw a force diagram for each ball as it flies through the air.
3. Ask students to predict the horizontal range and time of free fall
for this combination of balls.
4. How does the horizontal range for balls of unequal mass compare
to using balls of equal mass? Explain.
Note: It is not recommended
to use the most powerful
launch setting on the Long
Rang e Laun cher (ME-
6801) for this experiment.
5. How does the time of freefall for balls of unequal mass compare to
using balls of equal mass? Explain.
6. What must be changed to affect the time of free fall?
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