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Practicum Paris Gun
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A PID control loop for a simple linear system
Some stochasticity in the throttles and sensors
Double 1st order PID loop
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Problem of the sliding chain
Clone of Sliding Chain
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Z206 from Hartmut Bossel System Zoo 1 p99-102 See also a beautiful Youtube 3D Video Simulation

Clone of Lorenz Attractor
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Problem of the sliding chain
Clone of Sliding Chain
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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.

Lancamento obliquo no vacuo
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Clone of Nuclear Decay Chain
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Simple periodically driven damped oscillator.
Periodically Driven Damped Oscillator
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Clone of Nuclear Decay Chain
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Simple example of a 1D spring "solving" the differential equation using flows (dQ/dt) and stocks (Q). I had to remove "units" because you don't seem to be able to create units, by combining existing units. I needed "N/m" for the spring constant.
Clone of 1D Spring
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L'idée est de simuler le fonctionnement d'un siphon (vidange brusque d'un réservoir lorsqu'un certain seuil est atteint). Le flux de remplissage est basé sur une sinusoïde dont on peut régler l'amplitude et la fréquence (seule la partie positive de l'oscillation est utilisée).

Dans un second temps, nous utiliserons ensuite l'idée du siphon pour construire un circuit logique hydraulique non trivial (en l'occurrence un additionneur).
Simulation d'un siphon
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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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Clone of Wind Resistance Model
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Le but de cette simulation est de mettre en place des primitives qui génèrent des flux de diverses formes (sinusoïdales, rectangulaires,  triangulaires et en dent de scie) qui pourront ensuite être utilisées dans d'autres circuits hydrauliques plus complexes.
Hydraulic wave generators
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5. Lanceren van een raket in 1 dimensie
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Clone of Wind Resistance Model
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A Fourier series is a way to expand a periodic function in terms of sines and cosines. The Fourier series is named after Joseph Fourier, who introduced the series as he solved for a mathematical way to describe how heat transfers in a metal plate.

The GIFs above show the 8-term Fourier series approximations of the square wave and the sawtooth wave.

Clone of Fourier series
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Simulation der Flugbahn eines Federballs
Schiefer Wurf mit Strömungswiderstand
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Le but de cette simulation est de simuler l'évolution de niveau entre deux ou plusieurs réservoirs qui se remplissent l'un l'autre.

Les niveaux se stabilisent vers une valeur asymptotique.

On peut changer la valeur des résistances d'écoulement entre les différents réservoirs, ce qui change les niveaux d'équilibre des réservoirs une fois l'état stationnaire atteint.
Hydraulic oscillator
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Potential energy to Velocity
Clone of Velocity
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Problem of the sliding chain
Clone of Sliding Chain
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Electron in a Coulomb potential (H atom)

W1=-13.6 eV
-13.6 eV electron in a Coulomb potential (H atom)
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James Linskey rocket model tuned to match
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Simulation der Umlaufbahn der Erde um die Sonne
Clone of Kepler Ellipsen