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Griepvirus simulatie
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Bomba Ariete Original
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Model showing combination of 6 simple machines
Simple Machine
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Problem of the sliding chain
Clone of Sliding Chain
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Clone of Rocket Model
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Problem of the sliding chain
Clone of Sliding Chain
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Simple periodically driven damped oscillator.
Periodically Driven Damped Oscillator
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​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
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​The probability density function (PDF) of the normal distribution or Bell Curve of Normal or Gaussian Distribution is the mean or expectation of the distribution (and also its median and mode). 

The parameter is its standard deviation with its variance then, A random variable with a Gaussian distribution is said to be normally distributed and is called a normal deviate.
However, those who enjoy upskirts are called deviants and have a variable distribution :) 

A random variable with a Gaussian distribution is said to be normally distributed and is called a normal deviate.

If mu = 0 and sigma = 1

If the Higher Education Numbers Are Increased then the group decision making ability of society would be raised above that of a middle teenager as it is now
BUT 
Governments can control children by using bad parenting techniques, pandering to the pleasure principle, so they will make higher education more and more difficult as they are doing


85% of the population has a qualification level equal or below a 12th grader, 17 year old ... the chance of finding someone with any sense is low (~1 in 6) and the outcome of them being chosen by those who are uneducated in the policies they are to decide is even more rare !!!

Experience means little if you don't have enough brain to analyse it

Democracy is only as good as the ability of the voters to FULLY understand the implications of the policies on which they vote., both context and the various perspectives.   National voting of unqualified voters on specific policy issues is the sign of corrupt manipulation.

Democracy:  Where a group allows the decision ability of a teenager to decide on a choice of mis-representatives who are unqualified to make judgement on social policies that affect the lives of millions.
The kind of children who would vote for King Kong who can hold a girl in one hand and swat fighter jets out of teh sky off the tallest building, doesn't have a brain cell or thought to call his own but has a nice smile and offers little girls sweets.


updated 16/3/2020 from 4 years 3 months ago
Clone of ​The probability density function (PDF) of the normal distribution or Bell Curve Gaussian Distribution by Guy Lakeman
Insight diagram
Model describing a simple harmonic oscillator with adjustable damping parameters.
Damped harmonic oscillator
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​The probability density function (PDF) of the normal distribution or Bell Curve of Normal or Gaussian Distribution is the mean or expectation of the distribution (and also its median and mode). 

The parameter is its standard deviation with its variance then, A random variable with a Gaussian distribution is said to be normally distributed and is called a normal deviate.
However, those who enjoy upskirts are called deviants and have a variable distribution :) 

A random variable with a Gaussian distribution is said to be normally distributed and is called a normal deviate.

If mu = 0 and sigma = 1

If the Higher Education Numbers Are Increased then the group decision making ability of society would be raised above that of a middle teenager as it is now
BUT 
Governments can control children by using bad parenting techniques, pandering to the pleasure principle, so they will make higher education more and more difficult as they are doing


85% of the population has a qualification level equal or below a 12th grader, 17 year old ... the chance of finding someone with any sense is low (~1 in 6) and the outcome of them being chosen by those who are uneducated in the policies they are to decide is even more rare !!!

Experience means little if you don't have enough brain to analyse it

Democracy is only as good as the ability of the voters to FULLY understand the implications of the policies on which they vote., both context and the various perspectives.   National voting of unqualified voters on specific policy issues is the sign of corrupt manipulation.

Democracy:  Where a group allows the decision ability of a teenager to decide on a choice of mis-representatives who are unqualified to make judgement on social policies that affect the lives of millions.
The kind of children who would vote for King Kong who can hold a girl in one hand and swat fighter jets out of teh sky off the tallest building, doesn't have a brain cell or thought to call his own but has a nice smile and offers little girls sweets.


updated 16/3/2020 from 4 years 3 months ago
Clone of ​The probability density function (PDF) of the normal distribution or Bell Curve Gaussian Distribution by Guy Lakeman
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
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Control de una bicicleta
Bicicleta 1
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Flugbahn eines Federballs - Simulation und Messung (Tracker Video Analysis and Modeling Tool)
Clone of Schiefer Wurf mit Luftwiderstand
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Uma empresa de transportes precisa efetuar a entrega de uma encomenda o mais breve possível. Para tanto, a equipe de logística analisa o trajeto desde a empresa até o local da entrega. Ela verifica que o trajeto apresenta dois trechos de distâncias diferentes e velocidades máximas permitidas diferentes. No primeiro trecho, a velocidade máxima permitida é de 80 km/h e a distância a ser percorrida é de 80 km. No segundo trecho, cujo comprimento vale 60 km, a velocidade máxima permitida é 120 km/h. Supondo que as condições de trânsito sejam favoráveis para que o veículo da empresa ande continuamente na velocidade máxima permitida, qual será o tempo necessário, em horas, para a realização da entrega? 

Fonte: Enem 2012

Clique aqui para ver uma descrição do que é Movimento Uniforme.

Movimento Uniforme
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b) 102,3 s, 2197,6 m
c) richtingscoefficiënt neemt toe, dus snelheid neemt toe, wat betekent dat omstandigheden veranderen. Dit is naast het dalen van rho en verandering van het gewicht, dus Fz
d) als er geen brandstof wordt verbruikt, werkt de motor niet

Raket met brandstof
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This model shows the different forces that influences a skier speed
Speed of a skier during a turn with a defined radius
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Halley's Comet
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IACS
Dynamics Model of Rocket
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6. Raket met brandstofverbruik
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Problem of the sliding chain
Clone of Sliding Chain
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A PID control loop for a simple linear system
Some stochasticity in the throttle and sensor ​
Clone of 2nd Order PID Loop
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H2 opg 28
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Problem of the sliding chain
Clone of Sliding Chain