PASCO ME-9893 User Manual
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Instruction Manual
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012-09864C
*012-09864*
Discover Free Fall System
ME-9889
Discover Free Fall Accessory
ME-9893
Included Equipment ME-9889 Part Number
1. Drop Box assembly: ME-6839
Drop Box, main unit
Control Box
AC Adapter
Cable
2. Free Fall Ball Accessory: ME-9890
Release Washers (qty. 10)
Release Stickers (qty. 50)
Yellow Nylon Ball (2.5 cm diameter, 10 g)
Larger Stainless Steel Ball (2.5 cm diameter, 70 g)
Smaller Stainless Steel Ball (1.6 cm diameter, 16 g)
Regular Golf Ball (4.4 cm diameter, 50 g)
Practice Golf Ball (4.2 cm diameter, 6 g)
Large Hollow Plastic Ball (10 cm diameter, 40g)
ME-9893
800-772-8700 www.pasco.com
3. Timer Switch ME-9819
4. Time-of-Flight Accessory ME-6810
Required Equipment
Timing device (see page 3) See PASCO catalog
Mounting rods and base (see page 3) See PASCO catalog
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Discover Free Fall System Introduction
Drop Box
Time-of-Flight Accessory
Clamp higher
on rod for
increased fall
height
Figure 1: Drop box mounted on a rod stand
Introduction
The PASCO Discover Free Fall System consists of the ME-6839 Drop Box plus the
ME-9893 Discover Free Fall Accessory. The Discover Free Fall Accessory consists
of the Free Fall Ball Accessory (ME-9890), the Timer Switch (ME-9819) and the
Time-of-Flight Accessory (ME-6810).
The PASCO Discover Free Fall System allows students to precisely time falling
objects. The system includes several balls of various sizes and masses (ranging from
about 6 g to 70 g). Other objects of similar mass can also be used.
The object to be dropped is suspended from a magnet. When the timer switch is
pushed, the object is released and the timing starts. Timing stops when the object hits
the time-of-flight pad. The system includes steel washers and adhesive stickers to
allow non-steel objects to be suspended from the magnet.
The timer switch is a push-button device that simultaneously causes the drop box to
release the object and triggers the timing device to start timing.
The time-of-flight accessory is a pad that triggers the timing device to stop timing
when an object hits it.
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Model No. ME-9889 Mounting Options
Magnets for attaching
to ceiling
Remove
screw
Mounting Options
Mount the drop box on a horizontal rod attached with a right angle clamp to a tall rod.
Figure 1 shows a typical setup using a rod stand (ME-8735), a 120 cm vertical rod
(ME-8741), a 45 cm horizontal rod (ME-8736), and a right angle clamp (SE-9444).
Any similar configuration will work just as well. For a greater fall height, place the
rod stand on a table and the time-of-flight pad on the floor.
The drop box can also be attached magnetically to a steel part of the ceiling (see
Figure 2). This mounting method works well for maximizing the height from which
objects will be dropped.
Figure 2: Magnets for attaching to ceiling
Timing Device Options
In order to time the object, the system must be connected to one of the following timing devices:
• Smart Timer (ME-9830)
• ScienceWorkshop 500 or 750 interface connected to a computer running
DataStudio.
• PASPORT interface with a Digital Adapter (PS-2159). Any PASPORT interface
can be used connected to a computer running DataStudio. The Xplorer GLX
(PS-2002) can also be used in standalone mode without a computer.
For more information about these devices, see the PASCO catalog, visit
www.pasco.com, or contact PASCO Technical Support (see page 10).
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