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

Journal article


Publication Details

Author(s): Pöschel T, Nasato DS, Parteli EJR, Gallas J, Müller P
Journal: American Journal of Physics
Publication year: 2019
Volume: 87
Journal issue: 4
Pages range: 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 Authors / FAU Editors

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


External institutions with authors

Universität Köln


How to cite

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: 

Last updated on 2019-08-04 at 09:38