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TM 162 Bifilar/trifilar suspension of pendulums



  • Ideal mathematical pendulum can be demonstrated1
  • Moment of inertia in an experiment on a rotary pendulum


Technical Description

The model permits oscillations on pendulums with bifilar or trifilar suspension to be investigated. For this purpose a bar, a cylinder, or a hollow cylinder made of galvanised steel can be hung from a wall mounted carrier plate made of aluminium and placed in oscillation. The bodies used in the experiments have strong steel hooks for attachment to the suspension cords. The length of the cords can be rapidly changed and securely fixed using clamping wheels. The beam can oscillate, by translation, in the plane of suspension like an ideal mathematical pendulum. The cylinder and the circular ring work as rotary pendulums.

Learning Objectives / Experiments
- Oscillation experiments on a mathematical pendulum
- Determination of the centre of inertia of a beam, a cylinder and a hollow cylinder in a rotary pendulum experiment


[1] Rotary and pendulum oscillation experiments with 3 different bodies on bifilar / trifilar pendulums
[2] Quick-action clamp for the suspension cords
[3] Bar made of galvanised steel
[4] Cylinder made of galvanised steel
[5] Hollow cylinder made of galvanised steel
[6] Suspension cord length up to 2000mm possible

Technical Data

- lxwxh: 40x40x160mm
- mass: 2kg 

- Dxh: 160 x19mm
- mass: 3kg

Hollow cylinder
- outer diameter: 160mm
- inner diameter: 100mm
- height: 41mm
- mass: 4kg 

Cord thread length: up to 2000mm

Base plate
- wxh: 200x250mm

Dimensions and Weight
l x w x h : 205 x 200 x (2000) mm
Weight : approx. 12kg 

Scope of Delivery
1 base plate
1 beam
1 cylinder
1 hollow cylinder
3 cords
1 instruction manual

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