A Simple Alternative to the Phone Book Friction Demonstration
-
-
[1] Pontificia Universidad Católica de Valparaíso
Pontificia Universidad Católica de Valparaíso
Valparaíso, Chile
-
- Localización: The Physics Teacher, ISSN 0031-921X, Vol. 56, Nº. 6, 2018, págs. 370-372
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
-
Resumen
In this paper we describe a simple alternative to the telephone book friction experiment, a classic demonstration where a small force (generated for example by the bending of the outer pages) is amplified by the large number of surfaces in contact, resulting in a huge maximum static friction force that has to be counterbalanced in order to separate the books. The aim of our experiment is to illustrate the friction force in a dramatic way and to simplify the tedious job of interleaving a large number of book pages, by using the minimum number of sheets necessary to sustain the weight of a person using the normal force produced by their fingers
