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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!
Interact with real physics simulations — change variables like force, mass, and velocity, see what happens, and build genuine understanding. No memorizing formulas. Just hands-on, interactive physics learning that sticks.
Every simulation, quiz, and concept on Physiworld is completely free. No setup, no friction, no barriers — just open your browser and start learning physics instantly.
Change a variable and watch what happens in real time. Interactive feedback turns abstract physics concepts into genuine understanding — every single time.
Earn XP as you explore simulations, solve challenges, and master new concepts. Leaderboards, achievements, and progress tracking show exactly how far you've come in your physics journey.
From curious beginners to exam students and teachers around the world
"The Core/Supplement tags meant I only revised what my paper actually tests."
"I had zero background. This is the first time I didn't feel lost."
"Went from a 5 to a 7 in IGCSE Physics. The exam-style quizzes did it."
"Gravity finally makes intuitive sense to me."
"My class actually revises now — it doesn't feel like revision."
"Finally understood rotational motion before my AP Physics 1 exam."
"Worked solutions after every question is how I finally fixed my method marks."
"The XP system keeps me coming back every single day."
"The 0625 coverage is genuinely complete. Nothing caught me out."
"I'm 34 and just doing this for fun. It's honestly addictive."
"The Core/Supplement tags meant I only revised what my paper actually tests."
"I had zero background. This is the first time I didn't feel lost."
"Went from a 5 to a 7 in IGCSE Physics. The exam-style quizzes did it."
"Gravity finally makes intuitive sense to me."
"My class actually revises now — it doesn't feel like revision."
"Finally understood rotational motion before my AP Physics 1 exam."
"Worked solutions after every question is how I finally fixed my method marks."
"The XP system keeps me coming back every single day."
"The 0625 coverage is genuinely complete. Nothing caught me out."
"I'm 34 and just doing this for fun. It's honestly addictive."
"Walked into the exam calm because I'd seen every question type."
"Finally a physics resource that respects your intelligence."
"Best free IGCSE Physics practice I've found, full stop."
"Fits our NGSS units perfectly — students investigate instead of just reading."
"The instant feedback shows exactly where I lose marks."
"My students went from dreading physics to actually asking questions."
"Electricity used to terrify me — now it's my strongest topic."
"The simulations are incredibly well made."
"As a tutor, I point every student here first."
"Feels like how physics should be taught."
"Walked into the exam calm because I'd seen every question type."
"Finally a physics resource that respects your intelligence."
"Best free IGCSE Physics practice I've found, full stop."
"Fits our NGSS units perfectly — students investigate instead of just reading."
"The instant feedback shows exactly where I lose marks."
"My students went from dreading physics to actually asking questions."
"Electricity used to terrify me — now it's my strongest topic."
"The simulations are incredibly well made."
"As a tutor, I point every student here first."
"Feels like how physics should be taught."
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.
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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.
Concepts is a topic based section of Physiworld that gives you fast, clear answers to questions you've always wondered about — no account, no fluff, just physics that makes sense.
Everything you need to know about Physiworld.
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