On extracting momentum from supports: the bullet in the beam problem

Fuente: arXiv
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Autores principales: Zheng, Xiaoyu, Guo, Tianyi, Palffy-Muhoray, Peter
Formato: Preprint
Publicado: 2026
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author Zheng, Xiaoyu
Guo, Tianyi
Palffy-Muhoray, Peter
author_facet Zheng, Xiaoyu
Guo, Tianyi
Palffy-Muhoray, Peter
contents To gain insights into momentum transfer from the supporting environment, we consider the simple problem of a bullet, fired from below, into a wooden beam resting on two supports. The resulting upward velocity of the beam strongly depends on where the bullet enters the beam; this dependence is due to upward momentum extracted by the beam from its supports. Our simple example illustrates the momentum transfer mechanism exploited in the remarkable dynamics of the chain fountain.
format Preprint
id arxiv_https___arxiv_org_abs_2601_04585
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle On extracting momentum from supports: the bullet in the beam problem
Zheng, Xiaoyu
Guo, Tianyi
Palffy-Muhoray, Peter
Classical Physics
To gain insights into momentum transfer from the supporting environment, we consider the simple problem of a bullet, fired from below, into a wooden beam resting on two supports. The resulting upward velocity of the beam strongly depends on where the bullet enters the beam; this dependence is due to upward momentum extracted by the beam from its supports. Our simple example illustrates the momentum transfer mechanism exploited in the remarkable dynamics of the chain fountain.
title On extracting momentum from supports: the bullet in the beam problem
topic Classical Physics
url https://arxiv.org/abs/2601.04585