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.
Skip Nav Destination
PAPERS| September 01 2018
A Simple Alternative to the Phone Book Friction Demonstration
Phys. Teach. 56, 370–372 (2018)
Francisco Vera, Nicolas Fernandez, Manuel Ortiz; A Simple Alternative to the Phone Book Friction Demonstration. Phys. Teach. 1 September 2018; 56 (6): 370–372. https://doi.org/10.1119/1.5051149
Download citation file: