3B Scientific SW Physical Pendulum Set - Manual (Page 2)

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3. Technical data
Pendulum rods
Length:
450 mm
Weight: 45 g
Separation of bearing holes : 330 mm
Material: Transparent
acrylic
Weights
Weights:
2x 200 g approx.
1x 150 g approx.
Acrylic ring: 10 g approx.
Tension springs
Spring constant:
2.5 N/m
4. Set-up of pendulums without sensors
4.1 General information
The following additional equipment is necessary
in order to carry out the experiments:
1 SW stand equipment set
1012849
1 Digital stopwatch 1002811
A stopwatch can provide sufficiently accurate
results as long as at least 10 periods are meas-
ured.
• Make sure the stand rods are firmly fitted
into the base and that all other mounting ele-
ments are also firmly fitted to the stands.
• Do not bend the pendulum rods over the
bearings (otherwise they could break).
4.2 Set-up for a physical pendulum without
sensors
• Screw a stand rod with both external and
internal threads into the central threaded so-
ckets of the base plate and extend the rod
by screwing one with external thread only
onto the end.
• Slip a double clamp onto the rod.
• Insert a bearing rod into the double clamp
and slot the pendulum rod over the bearing.
Fig. 1 Set-up of pendulum rods
• Attach a 200-g weight (pendulum bob) to the
pendulum rod with the knurled screw.
Fig. 2 Set-up for physical pendulum without sensors
4.3 Set-up for a double pendulum without
sensors
• Screw the stand rods with both external and
internal threads into the outer threaded so-
ckets of the base plate.
• Extend both rods by screwing rods with ex-
ternal thread only onto the ends of them.
• Attach double clamps near the top of both
stand rods and turn them to point inwards so
that the slots are vertical and facing one an-
other.
• Clamp the cross bar into the slots of the two
double clamps.
• Insert bearing rods into the double clamps
and slot pendulum rods over the bearings.
• Couple the pendulum rods together with a
tension spring.
• Attach 200-g weights (pendulum bobs) to
the pendulum rods with the knurled screws.
Fig. 3 Set-up for coupled pendulum without sensors