3b-scientific Torsion Axle User Manual download pdf

3B SCIENTIFIC

PHYSICS

Torsion Axle U20050

Instruction sheet

03/11 Alf

1 Circular disc

2 Cross bar

3 Mount for test bodies

4 Spirit level

5 Bracket with coiled spring

6 Support rod

7 Weights

1. Safety instructions

If the coiled spring is too tightly wound, there is the

danger that high centrifugal forces cause the test

bodies to be hurdled away.

• Do not displace the test bodies more than a maxi-

mum of 360° (180° is recommended).

2. Description

The torsion axle with its corresponding accessories

and parts are used to investigate rotational oscilla-

tion and for determining the moments of inertia of

various sample objects from the period of oscillation.

The torsion axle consists of a shaft with twin ball races

which is coupled to a bracket by a coiled spring. A

support rod permits assembly on a stand base or a

table clamp. A spirit level is provided so that the tor-

sion axle can be aligned to the horizontal. The test

bodies are a cross bar with weights that can be

moved along its length and a circular disc with one

hole in the centre and eight away from the centre for

determining moments of inertia for eccentric axes of

rotation and confirming Steiner’s theorem.

3. Equipment supplied

1 shaft with bracket, coiled spring, support rod and

mount for test bodies

1 cross bar

2 weights

1 circular disc

4. Technical data

Restoring torque of the spring: 0.028 Nm/rad

Height of the torsion axle: approx. 200 mm

Cross bar:

Length: 620 mm

Mass: approx. 135 g

Weights: 260 g each

Circular disc:

Diameter: 320 mm

Mass: 495 g

Boreholes: 9

Borehole spacing: 20 mm

1 2 3 4

3B SCIENTIFIC 1
PHYSICS 1

Summary of Contents

Page 1 - PHYSICS

3B SCIENTIFIC® PHYSICS 1 Torsion Axle U20050 Instruction sheet 03/11 Alf 1 Circular disc 2 Cross bar 3 Mount for test bodies 4 Spirit le

Page 2

2 5. Accessories Set of Test Bodies for Torsion Axle U20051 Fig. 1 Set of Test Bodies for Torsion Axle 1 Wooden sphere, 2 Mounting plate, 3 Soli

Page 3

3 Torque: rFM ⋅= Restoring torque: α=MD Fig. 2 Determination of the restoring torque 8.2 Dependency of the moment of inertia J on the distance r

Page 4

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3b-scientific Torsion Axle User Manual

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