Drag coefficient of vertically moving popcorns
To take the students attention in physics lectures is always a challenge. The projectile motion is not an exception. Then, study of popcorn motion can be a way to introduce and motivate the students in this subject. In this work, the popcorn flight, caused by the popping process was recorded by a ce...
| Main Authors: | , |
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| Format: | Article |
| Language: | Portuguese |
| Published: |
Sociedade Brasileira de Física
2024-03-01
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| Series: | Revista Brasileira de Ensino de Física |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-11172024000100412&lng=en&tlng=en |
| _version_ | 1797277034912677888 |
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| author | Eduardo do Carmo Marcelo Goncalves Hönnicke |
| author_facet | Eduardo do Carmo Marcelo Goncalves Hönnicke |
| author_sort | Eduardo do Carmo |
| collection | DOAJ |
| description | To take the students attention in physics lectures is always a challenge. The projectile motion is not an exception. Then, study of popcorn motion can be a way to introduce and motivate the students in this subject. In this work, the popcorn flight, caused by the popping process was recorded by a cellular phone and analyzed frame by frame. Then, the drag coefficient (CD) of vertically moving popcorns is determined and its dependency with the vertical velocity (vy) and with the Reynolds number (Re) is explored. Our results show that CD increases exponentially when vy decreases. Also, CD shows higher uncertainties when the popcorn is close to its maximum vertical trajectory. The dependency of CD with Re shows that the popcorn flights are governed, mainly, by a laminar flow motion (Re ＜ 2000). |
| first_indexed | 2024-03-07T15:42:47Z |
| format | Article |
| id | doaj.art-a00da9c7dc9d47ada388baf6c309d4e5 |
| institution | Directory Open Access Journal |
| issn | 1806-9126 |
| language | Portuguese |
| last_indexed | 2024-03-07T15:42:47Z |
| publishDate | 2024-03-01 |
| publisher | Sociedade Brasileira de Física |
| record_format | Article |
| series | Revista Brasileira de Ensino de Física |
| spelling | doaj.art-a00da9c7dc9d47ada388baf6c309d4e52024-03-05T07:41:31ZporSociedade Brasileira de FísicaRevista Brasileira de Ensino de Física1806-91262024-03-014610.1590/1806-9126-rbef-2023-0261Drag coefficient of vertically moving popcornsEduardo do Carmohttps://orcid.org/0000-0001-8796-1856Marcelo Goncalves Hönnickehttps://orcid.org/0000-0003-3276-4323To take the students attention in physics lectures is always a challenge. The projectile motion is not an exception. Then, study of popcorn motion can be a way to introduce and motivate the students in this subject. In this work, the popcorn flight, caused by the popping process was recorded by a cellular phone and analyzed frame by frame. Then, the drag coefficient (CD) of vertically moving popcorns is determined and its dependency with the vertical velocity (vy) and with the Reynolds number (Re) is explored. Our results show that CD increases exponentially when vy decreases. Also, CD shows higher uncertainties when the popcorn is close to its maximum vertical trajectory. The dependency of CD with Re shows that the popcorn flights are governed, mainly, by a laminar flow motion (Re ＜ 2000).http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-11172024000100412&lng=en&tlng=enDrag coefficientpopcorntracker |
| spellingShingle | Eduardo do Carmo Marcelo Goncalves Hönnicke Drag coefficient of vertically moving popcorns Revista Brasileira de Ensino de Física Drag coefficient popcorn tracker |
| title | Drag coefficient of vertically moving popcorns |
| title_full | Drag coefficient of vertically moving popcorns |
| title_fullStr | Drag coefficient of vertically moving popcorns |
| title_full_unstemmed | Drag coefficient of vertically moving popcorns |
| title_short | Drag coefficient of vertically moving popcorns |
| title_sort | drag coefficient of vertically moving popcorns |
| topic | Drag coefficient popcorn tracker |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-11172024000100412&lng=en&tlng=en |
| work_keys_str_mv | AT eduardodocarmo dragcoefficientofverticallymovingpopcorns AT marcelogoncalveshonnicke dragcoefficientofverticallymovingpopcorns |