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File:25. Ротационен стол.ogv

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Македонски: Експериментот го покажува законот за запазување на моментот на импулс. Кога рацете на експериментаторот се собрани, моментот на инерција на телото е мал. Кога тој ќе ги рашири рацете се зголемува моментот на инерција и поради тоа се намалува брзината на ротација, односно се намалува аголната брзина. Така, производот од моментот на инерција и аголната брзина не се менува, со што моментот на импулсот останува исто така постојан. Подготвено, изведено и објаснето од проф. д-р Оливер Зајков, Институт за физика на Природно-математичкиот факултет во Скопје.
English: The experiment shows the conservation of angular momentum. When the experimenter keeps his arms close to his body, the moment of inertia of the body is small. When his arms are wide open, then the moment of inertia increases, while the angular velocity decreases. In that way, the product of the angular momentum and the angular velocity is constant i.e. angular momentum is conserved. Prepared, performed and explained by Prof. Oliver Zajkov at the Physics Institute at the Ss. Cyril and Methodius University of Skopje, Macedonia.
Română: Experiment cu scaun rotativ, ilustrând momentul de inerție. Când omul care se rotește își apropie brațele, momentul său de inerție scade; pentru a conserva momentul cinetic, îi crește viteza unghiulară. Efectuat de prof. Oliver Zajkov de la Institutul de Fizică al Universității Sfinții Chiril și Metodiu din Skopje, Macedonia.
Français : Démonstration de la conservation du moment cinétique.
Le moment cinétique d'un corps dépend de son moment d'inertie et de sa vitesse angulaire. En l'absence d'élément extérieur, le moment angulaire se conserve. Ainsi, une diminution de l'un des facteurs sera compensée par l'augmentation de l'autre.
Le moment d'inertie dépend de la masse et de la distance entre celle-ci et l'axe de rotation. Ainsi, lorsque les bras sont proches du corps, donc de l'axe de rotation, le moment d'inertie est plus faible et la rotation, plus rapide que lorsque les bras sont éloignés du corps.
Expérience réalisée et expliquée par le professeur Oliver Zajkov de l'Institut de physique de l'université Saints-Cyrille-et-Méthode de Skopje de Macédoine.
Türkçe: Döner sandalye deneyi eylemsizlik momentini açıklar. Sandalyede dönen profesör kollarını açtığında eylemsizlik momenti azalır; açısal momentumu korumak için açısal hızı azalır.
Deney Makedonya Üsküp Cyril ve Methodius Üniversitesinden Prof. Oliver Zajkov tarafından yapılmıştır.
Date
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Author Andrejdam

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Video illustrating conservation of angular momentum.

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21 September 2015

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application/ogg

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00b6170d87d686beeff44ca977329764de2aa173

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22.6986666666667 second

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current12:18, 29 January 201623 s, 1,920 × 1,080 (24.33 MB)AndrejdamUser created page with UploadWizard

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