Title

Using a Rotating Column of Liquid on a Recycled Record Player to Measure the Acceleration of Gravity

Document Type

Article

Publication Date

2009

Publication Source

World Transactions on Engineering and Technology Education

Volume

7

Issue

2

Inclusive pages

151-156

Publisher

UNESCO * International Centre for Engineering Education

Place of Publication

Australia

ISBN/ISSN

14462257

Peer Reviewed

yes

Abstract

An experimental method that uses a cylindrical column of liquid that rests on the rotating turntable of a recycled record player to measure the acceleration of gravity is presented in this article. It relies on the established fact that the free surface of a rotating column of liquid takes the shape of a paraboloid of revolution that can be determined uniquely using the original height, radius and speed of rotation of the column, and the local acceleration of gravity. The method consists of measuring the coordinates of the free surface of a spinning liquid and the rate of rotation of the column, and relating them analytically to the local acceleration of gravity.

Disciplines

Engineering

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