Insight diagram
H2 opg 28
Insight diagram
Bomba Ariete Original
Insight diagram
Problem of the sliding chain
Clone of Sliding Chain
Insight diagram
Problem of the sliding chain
Clone of Sliding Chain
Insight diagram
Griepvirus simulatie
Insight diagram
1. Eenparig Versnelde Beweging
Insight diagram
Problem of the sliding chain
Clone of Sliding Chain
Insight diagram
Le but de cette simulation est de montrer comment on peut utiliser un circuit hydraulique à effet de seuil (en l'occurrence un mécanisme de siphon) pour implémenter des fonctions logiques basées sur des flux hydrauliques

Nous allons utiliser ces fonctions pour construire un circuit arithmétique capable de calculer en binaire la somme de deux nombres de 3 bits chacun, ce qui donne un résultat sur 4 bits.

Le circuit est basé sur un assemblage tout à fait classique de briques élémentaires, à savoir un demi-additionneur suivi de 2 additionneurs. pleins. Au cœur du circuit, on trouve une porte logique un peu particulière, capable de calculer en même temps le XOR et le AND des deux entrées. La retenue est obtenue en OR-ant la sortie des deux portes AND, dont le flux doit être réduit en introduisant un réservoir intermédiaire qui permet de diviser le flux en 2 parties égales.
Le résultat sur chaque bit est utilisé pour activer (par l'intermédiaire d'une action) un état en sortie.

Nous n'avons malheureusement pas réussi à changer la couleur de l'état en fonction de sa valeur. Celle-ci peut être changée dans le panneau de configuration, afin de tester des valeurs différentes.

On notera que pour obtenir un résultat correct, deux conditions sont nécessaires:
1°) Il faut attendre que les flux dans les portes se stabilisent, ce qui prend pas moins de 10 secondes (et qui reflète le délai de latence inhérent à tout circuit, qui correspond environ au nombre maximum de portes logiques traversées entre l'entrée et la sortie du circuit.
2°) Il faut utiliser la méthode de simulation basée sur une approximation de Runge-Kutta, sous peine de voir apparaître des oscillations parasites dans certaines portes qui rendent le résultat instable.


L'eaurdinateur
Insight diagram
Problem of the sliding chain
Clone of Sliding Chain
Insight diagram
Clone of Rocket Model
Insight diagram
​Força de arrasto linear referências:

CREF - Velocidade das gotas de chuva. 27 de abril, 2020. É verdade que as gotas de chuva sempre caem com a mesma velocidade devido a gravidade? Respondido por: Prof. Fernando Lang da Silveira - www.if.ufrgs.br/~lang/
https://www.if.ufrgs.br/novocref/?contact-pergunta=velocidade-das-gotas-de-chuva

CREF - Velocidade de pedras de granizo no solo. 22 de outubro, 2015. Respondido por: Prof. Fernando Lang da Silveira - www.if.ufrgs.br/~lang/
https://www.if.ufrgs.br/novocref/?contact-pergunta=velocidade-das-pedras-de-granizo-ao-chegarem-ao-solo

 Silveira, F. (2015). Velocidade das pedras de granizo Hailstone speed. https://doi.org/10.13140/RG.2.2.33619.94245

https://www.researchgate.net/publication/339536656_Velocidade_das_pedras_de_granizo_Hailstone_speed


Aula 10 - Velocidade Terminal 
https://www.cesadufs.com.br/ORBI/public/uploadCatalago/11393004052012Fisica_Basica_Aula_10.pdf

Aerodinâmica da Bola de Futebol: da Copa de 70 à Jabulani Carlos Eduardo Aguiar Programa de Pós-Graduação em Ensino de Física Instituto de Física - UFRJ
https://www.if.ufrj.br/~sandra/Topicos/palestras/futebol2.pdf

Número de Reynolds
https://betaeq.com.br/index.php/2019/08/27/reynolds/

https://www.guiadaengenharia.com/numero-reynolds-entenda/

Aula 5.2 - Origem física do arrasto linear e quadrático: o número de Reynolds. Mecânica Clássica UFF Prof. Jorge de Sá Martins 
https://www.youtube.com/watch?v=_PW3GY7eZl8

Viscosidade, turbulência e tensão superficial - IF UFRJ
https://www.if.ufrj.br/~bertu/fis2/hidrodinamica/viscosidade.html
 
Sugestões de Modelagem (Leonardo):

Revista Brasileira de Ensino de Física, vol. 41, nº 3 (2019) É seguro atirar para cima? Uma analise da letalidade de projéteis subsônicos. Saulo Luis Lima da Silva, Herman Fialho Fumiã.
https://www.scielo.br/pdf/rbef/v41n3/1806-9126-RBEF-41-3-e20180260.pdf

FRENAGEM DE UM PROJÉTIL EM UM MEIO FLUIDO: “QUAL SERIA A DISTÂNCIA, DENTRO DA ÁGUA, PERCORRIDA POR UM PROJÉTIL CALIBRE .50 COM MASSA DE 50 G E VELOCIDADE DE 850 M/S?”  Fernando Lang da Silveira Instituto de Física – UFRGS 
https://periodicos.ufsc.br/index.php/fisica/article/view/2175-7941.2013v30n1p156/24490


Clone of Fall with drag force
Insight diagram
Problem of the sliding chain
Clone of Sliding Chain
Insight diagram

OBLIQUE THROW IN VACUUM

A body is thrown obliquely into the vacuum at an initial velocity of 100 m / s, in a direction that forms with the horizontal an angle x, such that sin (x) = 0.8 and cos (x) = 0.6. Adopting g = 10m / s², determine:

(a) the horizontal and vertical velocity component modules at the moment of launch;

(b) the instant at which the body reaches the highest point of its trajectory;

c) the maximum height reached by the body;

d) The range of the throw.

Source: RAMALHO, NICOLAU AND TOLEDO; Fundamentos de Física, Volume 1, 8th edition, pp. 12 - 169, 2003.

This model may be cloned and modified without prior permission of the authors. Thanks for quoting the source.

PHYSICS: Kinematics, Projectile
Insight diagram
Problem of the sliding chain
Clone of Sliding Chain
Insight diagram
Paris Gun Tegenwind 70km
Insight diagram
IACS
Dynamics Model Styrofoam
Insight diagram

Um veículo parte do repouso em movimento retilíneo e acelera com aceleração escalar constante e igual a 2,0 m/s2. Pode-se dizer que sua velocidade escalar e a distância percorrida após 3,0 segundos, valem, respectivamente:

Fonte: FUVEST -2004

Clique aqui para ver uma descrição do que é Movimento Uniformemente Variado

Movimento Uniformemente Variado
Insight diagram
This system models the equation of motion of a projectile in the horizontal (x) and vertical (y) directions, with a linear drag force. The drag is quantified by a drag coefficient C, which can be set by means of a slider.

Note that the equation has been made non-dimensional by measuring time in units of v_0/g, and distance in units of v_0^2/g. In these units, the acceleration due to gravity is simply 1. Also the "seconds" in the time axis of the graphs really means the time units defined here. Also in these units the initial speed is simply 1. 

The inclination has been fixed at Pi/2. A later version will let this change with a slider.

One of the displays is y vs. x, which shows the trajectory of the projectile. 
Free fall with linear drag
Insight diagram

Z212 from System Zoo 1 p142-148

Clone of House Heating Dynamics
Insight diagram
Problem of the sliding chain
Clone of Sliding Chain
Insight diagram
Problem of the sliding chain
Clone of Sliding Chain
Insight diagram
damped pendulum
Insight diagram
Clone of Paris Gun Tegenwind 70km
Insight diagram
How gravity and air drag interact in two-dimensional motion. 

The standard parabolic trajectory acts more like the old cartoon motif "run off a cliff and fall straight down" when air drag is included.
Cartoon trajectory