Ping-pong ball cannon: Why do barrel and balls fly in the same direction?

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Pöschel T, Nasato DS, Parteli EJR, Gallas J, Müller P
Zeitschrift: American Journal of Physics
Jahr der Veröffentlichung: 2019
Band: 87
Heftnummer: 4
Seitenbereich: 255-263
ISSN: 0002-9505


Abstract

An impressive ping-pong ball cannon can be made by placing a bottle of liquid nitrogen at the bottom of a container and quickly covering it with, say, 1500 ping-pong balls. The liquid turns rapidly into a gas whose mounting pressure explodes the bottle, sending a swarm of balls upward out of the container. Surprisingly, the container also moves upward. This is a counterintuitive effect because the balance of forces, that is, Newton's third law does not seem to allow the container to move upwards. We explain the effect as a consequence of granular jamming in combination with Coulomb's friction law. (C) 2019 American Association of Physics Teachers.


FAU-Autoren / FAU-Herausgeber

Gallas, Jason Prof. Dr.
Lehrstuhl für Multiscale Simulation of Particulate Systems
Müller, Patric Dr.
Lehrstuhl für Multiscale Simulation of Particulate Systems
Pöschel, Thorsten Prof. Dr.
Lehrstuhl für Multiscale Simulation of Particulate Systems


Autor(en) der externen Einrichtung(en)
Universität Köln


Zitierweisen

APA:
Pöschel, T., Nasato, D.S., Parteli, E.J.R., Gallas, J., & Müller, P. (2019). Ping-pong ball cannon: Why do barrel and balls fly in the same direction? American Journal of Physics, 87(4), 255-263. https://dx.doi.org/10.1119/1.5088805

MLA:
Pöschel, Thorsten, et al. "Ping-pong ball cannon: Why do barrel and balls fly in the same direction?" American Journal of Physics 87.4 (2019): 255-263.

BibTeX: 

Zuletzt aktualisiert 2019-08-04 um 09:38