Free physics simulations for your classroom.
29 interactive simulations for Class 6 to 12 and JEE, each with a ready-made 15-minute lesson, a quiz and answers to the questions students ask. Free, no sign-up, no ads.
Project it
Open any simulation on the classroom projector or smart board. Ask the class to predict, then drag and test it together.
Send it
Every page has one-tap buttons for WhatsApp, Google Classroom and Microsoft Teams. Students open it on any phone.
Embed it
Copy the embed code from any page into your school website, Google Sites, Moodle or blog. It stays free and ad-free.
A lesson in three steps
Every simulation page ends with a Use it in class box that turns it into a 15-minute lesson. It follows the predict, explore, explain pattern that physics education research keeps finding works better than showing first:
- Predict. Ask a question before anyone touches the simulation, and have students commit to an answer.
- Explore. Work through the challenges on screen. Each one is a small experiment with a clear goal, and students earn a star when they get it.
- Explain. Go back to the prediction, read the short explanation together, and finish with the quiz.
Embedding on a school website
Copy the embed code from the Use it in class box on any simulation. It shows just the simulation, its readouts and challenges, with a link back to the full lesson.
- Google Sites: Insert → Embed → Embed code, then paste.
- Moodle: in the text editor, switch to HTML view and paste.
- WordPress: add a Custom HTML block and paste.
Find simulations by class
Printable worksheets
Every simulation has a worksheet students fill in with the simulation open: a table to complete in the lab, a few numericals and a think-it-through question, with an answer key on its own page. They're linked in the table below, or see all worksheets by topic.
All simulations
| Simulation | Topic | Syllabus | Worksheet |
|---|---|---|---|
| Phases of the Moon | 🌙 Astronomy | Class 7 Ch 12 · Class 8 Ch 11 | |
| Day, Night and Seasons | 🌙 Astronomy | Class 7 Ch 12 | |
| Orbits and Escape Velocity | 🌙 Astronomy | Class 11 Gravitation | |
| Solar System to Scale | 🌙 Astronomy | Class 6 Ch 12 Beyond Earth | |
| Rocket Staging | 🌙 Astronomy | Class 11 Laws of Motion | |
| Night Sky and the Pole Star | 🌙 Astronomy | Class 6 Beyond Earth | |
| Your Weight on Other Worlds | 🌙 Astronomy | Class 9 Gravitation | |
| Tides | 🌙 Astronomy | Class 9 Gravitation | |
| Earth to the Edge of the Universe | 🌙 Astronomy | Class 6 Beyond Earth · Class 8 | |
| Chandrayaan-3: Journey to the Moon | 🌙 Astronomy | Class 9 & 11 Gravitation · Space science | |
| Projectile Motion | ⚙️ Mechanics | Class 11 Motion in a Plane | |
| Forces and Friction | ⚙️ Mechanics | Class 8 Ch 5 · Class 9 Laws of Motion | |
| Levers and Pulleys | ⚙️ Mechanics | ICSE Class 10 Machines | |
| Pendulum and Spring | ⚙️ Mechanics | Class 11 Oscillations | |
| Rolling and Torque | ⚙️ Mechanics | Class 11 Rotational Motion | |
| Gear Train Lab | ⚙️ Mechanics | Theory of Machines · Diploma / B.Tech | |
| Hydraulic Lift | ⚙️ Mechanics | Class 8 Ch 6 · Class 11 Fluids | |
| Four-Stroke Engine | ⚙️ Mechanics | Diploma / B.Tech Thermal Engineering | |
| Car Differential | ⚙️ Mechanics | Automobile Engineering | |
| Floating, Sinking & Buoyancy | ⚙️ Mechanics | Class 8 & 9 Floating and Sinking · Class 11 Fluids | |
| Electric Circuits and Ohm's Law | ⚡ Electricity | Class 6–7 Electricity · Class 10 Electricity | |
| Electromagnets | ⚡ Electricity | Class 7 · Class 10 Magnetic Effects of Current | |
| Electromagnetic Induction | ⚡ Electricity | Class 12 Electromagnetic Induction · JEE | |
| Mirrors and Ray Diagrams | 💡 Light | Class 7 Light · Class 10 Reflection | |
| Lenses and the Lens Formula | 💡 Light | Class 10 Refraction · Class 12 Ray Optics | |
| Refraction and Prisms | 💡 Light | Class 8 Light · Class 10 Refraction & Dispersion | |
| The Human Eye & Glasses | 💡 Light | Class 10 The Human Eye | |
| Sound Waves | 🔊 Sound | Class 8 · Class 9 Sound | |
| Heat Conduction | 🔥 Heat | Class 7 Heat · Class 11 Thermal Properties |
Something you'd like for your class? Write to hello@jugnix.com: teachers' requests decide what we build next.
Common questions
Are the Jugnix simulations free for schools?
Yes. Every simulation, quiz and worksheet is free to use in class, at home and on school websites. There are no accounts, no ads and no paid tier.
Do students need to sign up or install anything?
No. The simulations run in any modern browser on phones, tablets, Chromebooks, laptops and smart boards. Students just open the link.
How do I embed a simulation in Google Sites?
Scroll to 'Use it in class' on the simulation's page and copy the embed code. In Google Sites, choose Insert, then Embed, then the 'Embed code' tab, and paste it. The same code works in Moodle, WordPress (Custom HTML block) and most school website builders.
Can I share a simulation in Google Classroom or on WhatsApp?
Yes. Each simulation page has buttons that share it straight to Google Classroom, WhatsApp or Microsoft Teams, plus a Copy link button for anywhere else.
Is student data collected?
No personal data is collected. Stars and quiz progress are saved only in the student's own browser. We count anonymous page visits without cookies, as described on our privacy page.
Which syllabus do the simulations follow?
They are matched to the NCERT and CBSE science syllabus for Classes 6 to 12, and to JEE physics topics. Each simulation page shows which classes it is for, and the class pages group them by topic.