🧲 Physique
Outils de physique interactifs : mouvement de projectile, ondes, optique, cinématique et circuits électriques.
Simulez des trajectoires de projectile avec angle, vitesse et gravité réglables.
Ouvrir l'outil →Calculez tension, courant, résistance et décodez les bandes de couleur des résistances.
Ouvrir l'outil →Visualisez l'interférence des ondes avec fréquence, amplitude et phase réglables.
Ouvrir l'outil →Résolvez les équations SUVAT pour le déplacement, la vitesse, l'accélération et le temps.
Ouvrir l'outil →Générateur de diagramme de rayons pour lentilles convergentes et divergentes.
Ouvrir l'outil →Mechanics, optics and circuit theory — the standard calculations from an introductory physics course, with the working shown so you can follow the method rather than copy an answer.
Most of these have a diagram alongside the numbers, because the point where these problems go wrong is usually the setup rather than the algebra: a sign convention, an angle measured from the wrong axis, a component resolved the wrong way.
Which tool do I want?
| If you… | Use |
|---|---|
| Constant acceleration, and you know three of five variables | Calculateur de cinématique |
| Something is launched at an angle | Mouvement de projectile |
| You need voltage, current, resistance or power | Calculateur loi d'Ohm |
| You are working with wavelength, frequency or speed | Visualiseur d'ondes |
| You need image distance or magnification | Calculateur de lentilles |
Pick a positive direction and hold it
Nearly every wrong SUVAT answer is a sign error rather than an arithmetic one. The equations do not know which way is up; you have to decide, and then stay consistent for every quantity in the problem.
Take a ball thrown upward at 20 m/s. Call up positive and gravity is −9.81 m/s², so at the top the velocity is zero and the displacement is positive. Call down positive and the initial velocity is −20 with gravity at +9.81. Both give the same physical answer. Mixing them — a positive initial velocity with positive gravity — gives a ball that accelerates upward forever.
The same discipline covers displacement versus distance. Throw a ball up and catch it and the displacement is zero while the distance travelled is twice the peak height. SUVAT solves for displacement, so a zero is often correct and simply not the number you wanted.