3B Scientific Accessories for Rope Waves User Manual
3B SCIENTIFIC® PHYSICS
Accessories for Rope Waves U85560081
Instruction Sheet
09/10 ALF
1 Rubber rope
2 Base plate
3 Deflection device
4 Stand rod
5 Holder for dynamometer
1. Description
The set of accessories for rope waves is used with the
vibration generator U8556001 to demonstrate
standing transverse waves on a rubber rope and to
investigate the dependence of their wavelength on the
frequency and the tension.
The stretched rope is excited into oscillation by
applying the vibration generator to one side of it.
2. Contents
1 Base plate
1 Stand rod
1 Holder for dynamometer
1 Deflection device
1 Rubber rope
3. Technical data
Dimensions: 180 x 180 x 525 mm³ approx.
Rope length: 1 m approx.
4. Additionally required equipment
1 Vibration generator U8556001
1 Function generator F12 (230 V, 50/60 Hz) U21015-230
or
1 Function generator F12 (115 V, 50/60 Hz) U21015-115
1 Precision dynamometer, 5 N U20034
Experiment leads
1
5. Operation
5.1 Set-up
• Screw the stand rod into the base plate.
• Screw the deflection device and the holder for the
dynamometer onto the stand rod and clamp them
in position.
• Hang the dynamometer on the holder. If
necessary, first calibrate the zero point.
• Connect the function generator to the vibration
generator.
• Attach the rubber rope to the vibration generator,
pass it under the deflection device then upwards,
and hang it on the dynamometer. Ensure that it
runs as parallel as possible to the base plate. The
length of the rope when stretched should be
between 50 cm and 70 cm.
5.2 Experiment procedure
• Apply tension to the rubber rope by moving the
dynamometer.
• On the function generator, select the “sine” wave-
form and the 3 kHz frequency range.
• Adjust the frequency until 4 vibration loops are
obtained.
The wavelength is now half the length of the cord.
• Move the dynamometer higher up the rod until
the tension is four times the previous value.
The band now vibrates with just one peak and one
trough. The wavelength is therefore equal to the
length of the band.
The following parameters are found to give good
results:
Rope length (= distance from vibration generator to
deflection device): 60 cm, Frequency; approx. 44 Hz,
initial cord tension: 0.5 N
Rope length: 70 cm, Frequency; approx. 38 Hz, initial
cord tension: 0.5 N
U21015
44 Hz
Frequency
3 kHz
Amplitude
Vibration generator
U8556001
Fig. 1 Experiment set-up
Elwe Didactic GmbH • Steinfelsstr. 6 • 08248 Klingenthal • Germany • www.elwedidactic.com
3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany • www.3bscientific.com
Subject to technical amendment
© Copyright 2010 3B Scientific GmbH
Loading...