3B Scientific SW Physical Pendulum Set User Manual

SCIENTIFIC

SW Set – Physical Pendulum 1012853

Instruction manual

10/13 TL/ALF

®

PHYSICS

1 Weight, 200 g

2 Weight, 150 g

3 Acrylic ring

4 Pendulum rod

5 Coupling spring

6 Bearing rod

7 Tension spring

1. Description

The physical pendulum set is designed for as­sembly of a physical pendulum with a movable
bob, a double coupled pendulum, a reversible
(Kater) pendulum or a metronome pendulum in
a space-saving table-top experiment set-up.

It consists of pendulum rods, bearing rods and
weights for constructing the pendulums them­selves, as well as additional components for
attaching them to the dynamic force sensors
from the SW sensors set in order to record and
extensively analyse the oscillations with the help
of an oscilloscope.

2. Equipment

2 Pendulum rods
2 Bearing rods
2 Weights, 200 g
1 Weight, 150 g
1 Acrylic ring
1 Tension spring
2 Coupling springs

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3. Technical data

Pendulum rods

• Attach a 200-g weight (pendulum bob) to the

pendulum rod with the knurled screw.

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 meas­ured.

• Make sure the stand rods are firmly fitted

into the base and that all other mounting ele­ments 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 so­ckets 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

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 so­ckets 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 an­other.

• 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.

and slot the pendulum rod over the bearing.

Fig. 1 Set-up of pendulum rods

Fig. 3 Set-up for coupled pendulum without sensors

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