School of Physics Lecture Demonstration Manual

Mg-2 Kater's Reversible Pendulum

Published: Thursday 09 March 2006 - Updated: Thursday 24 March 2011

Aim

To determine "g" using the reversible pendulum method.

Apparatus

Diagrams

Click on pictures to enlarge.

Kater's Reversible Pendulum 1

Kater's Reversible Pendulum 2

Katers Pendulum Diagram

Videos

Kater's Reversible Pendulum

Description

Kater's reversible pendulum consists of a rod provided with two knife edges facing inward on opposite sides of the centre of mass. The bobs are adjustable in position. These positions are adjusted until the periods are the same when the pendulum is suspended from either knife edge.

When this is the case

g=4pi²/T²(h1+h2)

where (h1+h2) is the distance between the knife edges.

Safety notes

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