3B SCIENTIFIC PHYSICS U11362 Instructions D'utilisation page 4

5. Instructions
•
Place the sensor box near the experiment and
fix the accelerometer (the small black box)
firmly to the body for which the acceleration is
to be measured (the target) using either the
Velcro strip supplied or a screw fixing.
•
Read off the value of the acceleration on the
display of the 3B NETlog
6. Applications
Experiments using roller or air-cushion tracks:
Measurements of acceleration during elastic and
inelastic collisions
Measurements during circular motion in a
horizontal plane:
Relationships between acceleration and period,
radius, mass
Measurements involving circular motion in a
vertical plane
Experiments involving jumping, landing with knees
stiff and knees loose
Outdoor experiments:
In a car, bungee-jumping, skiing, or cycling, a big
dipper
7. Sample Experiments
Recording acceleration
skipping-rope activity
Equipment needed:
TM
1 3B NETlog unit
TM
1 3B NETlab software
1 Accelerometer, ±25g
•
TM
In 3B NETlab , open the application (template)
for experimenting
accelerometer.
•
Attach the accelerometer to one person's ankle
using a Velcro strip or a bandage.
•
Jump over an real or imaginary skipping-rope
for a period of 10 seconds.
•
Simultaneously start the recording of an
experimental data curve in 3B NETlab
•
Interpret the experimental curve.
3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany •
TM
unit.
behaviour during
U11300
U11310
U11362
±25g
with the
TM
(Fig. 1).
Subject to technical amendments.
© Copyright 2008 3B Scientific GmbH
Fig. 1 Typical acceleration behaviour at the ankle of a
skipping person, recorded with the 3B NETlab
(U11310)
In Figure 1 it can be seen that, in addition to the
skipping acceleration signal, there is a constant
gravitational acceleration of 9.81 m/s², resulting in
a background value of 1g.
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TM