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Interactive simulations, instant feedback, and XP that makes physics actually stick. Learn from the ground up, climb the leaderboard, and walk into IGCSE, GCSE, AP Physics 1 or NGSS assessments ready. Free!
Build your understanding through interactive lessons, explore physics concepts with simulations, and test your knowledge with quizzes. Earn XP as you learn, track your progress, and keep developing your physics skills.
Access interactive lessons, quizzes, simulations, and explorations completely free. Learn at your own pace, earn XP as you progress, and build your physics knowledge without paywalls or barriers.
Explore interactive simulations and see physics come to life. Change variables, experiment with different conditions, and watch the results unfold in real time as you discover how physics works.
Earn XP as you complete lessons, quizzes, and challenges. Track your progress, climb the leaderboard, and customize your profile as you build your physics skills.
For students, teachers, and anyone curious about physics
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"A bit like Brilliant, but more specific about physics. Feels just like the lab simulations from my physics labs."
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"YouTube videos weren’t cutting it — way too much effort to find the useful parts. This is exactly what I needed."
"Something like Duolingo but with physics. It was boring for me in high school — this actually got me interested."
"Learning physics is awful; this tool makes it much easier — and dare I say fun!"
"Thoroughly impressed with how engaging it was and simple to use. Will definitely be using it more."
"Looks and feels fun yet professional. I’m not in science and still learned a thing or two within the first few clicks."
"A cool and effective way to teach students physics."
"A bit like Brilliant, but more specific about physics. Feels just like the lab simulations from my physics labs."
"Just made an account and was surprised by how good it is — exactly the tool I’d been looking for before my course starts."
"Understanding physics concepts is hard. Gamifying the fundamentals will really help students who struggle."
"The simulations are pretty fun — solid for a free physics site."
"YouTube videos weren’t cutting it — way too much effort to find the useful parts. This is exactly what I needed."
"Quick, simple problems that help me step up to the harder ones my professor gives out."
"Interactive tools can make complex subjects like physics way more engaging. Definitely using it for my studies."
"The visuals really helped me understand — I’ll be using this site regularly for help."
"Made an account already — looks great!"
"You can find yourself just browsing away — there’s a lot to go through."
"I haven’t seen many interactive physics websites. Pretty cool concept."
"Saved it for my A-level physics revision."
"Nice visual effects — the demo looks promising."
"Love it. Keep up the good work."
"Quick, simple problems that help me step up to the harder ones my professor gives out."
"Interactive tools can make complex subjects like physics way more engaging. Definitely using it for my studies."
"The visuals really helped me understand — I’ll be using this site regularly for help."
"Made an account already — looks great!"
"You can find yourself just browsing away — there’s a lot to go through."
"I haven’t seen many interactive physics websites. Pretty cool concept."
"Saved it for my A-level physics revision."
"Nice visual effects — the demo looks promising."
"Love it. Keep up the good work."
That sinking feeling when a question looks nothing like your notes? It disappears when you've actually understood the physics. Physiworld covers the complete Cambridge IGCSE Physics (0625) syllabus and builds the concept-first understanding that IGCSE, GCSE, AP Physics 1 and NGSS all reward — learn each idea, prove it with exam-style questions, and see exactly where every mark comes from.
Work through interactive physics lessons that build genuine understanding — so you can reason through unseen questions on any paper, from IGCSE and GCSE to AP Physics 1, instead of hoping you memorised the right formula.
Every question is written around the official Cambridge IGCSE 0625 syllabus and tagged Core or Supplement, with a full worked solution after every answer. The same reasoning-first practice maps directly onto AP Physics 1 skills and NGSS performance expectations.
Turn "I sort of get it" into marks on the page. Build the technique, speed and confidence that lift your grade — whether that's an IGCSE 7, a GCSE 9 or a 5 on AP Physics 1 — and deepen your understanding for good.
Original questions aligned to the Cambridge IGCSE 0625 syllabus, with practice that also prepares you for GCSE, AP Physics 1 and NGSS-aligned courses. Physiworld is not affiliated with Cambridge Assessment or the College Board. AP is a registered trademark of the College Board.
Every simulation you run, every quiz you complete — it all counts toward a shared goal.
Sign in to see your rank and contribute to this week's goal!
Type a calculation and press enter — the free calculator solves it with full step-by-step working. No sign-up required.
Bring interactive physics into your IGCSE, GCSE, AP Physics 1 or NGSS classroom. Let students experiment, visualise, and truly understand the curriculum — not just memorise formulas.
Explore takes real-world events and everyday mysteries — floating astronauts, sinking ships, crashing spacecraft — and turns them into interactive physics you can play with. No fluff, just physics that makes sense.
Everything you need to know about Physiworld.
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