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Academic · Class 9

Physics

Learn every chapter of the book by seeing it — watch what you read happen in front of you, explained in plain Bangla. Understand it, don't memorise it.
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What you get

  • All 13 textbook chapters, each section its own lesson
  • Explained step by step in plain Bangla, like a tutor
  • Every idea animated — watch it happen
  • Run the experiments yourself — tap buttons, drag sliders
  • Questions mid-lesson and a quiz at the end, checked instantly
  • Formulas with worked examples; practice after every chapter
  • Watch on phone or computer, from anywhere
  • 13 chapters
  • 113 lessons
  • Free demo lessons
  • Follows the textbook
See the chapters

What the lessons are like

Not videos — science happening in front of you

Every Physics lesson is built as an animation. Where a thrown ball goes, where light bends — you watch it happen, while a voice explains it in plain Bangla.

  • Explained in animationEvery law and event moves on screen — understand it instead of memorising it.
  • Bangla voice-overStep-by-step explanations in Bangla — hard words made simple.
  • At your own pacePause, go back, watch again. It remembers where you stopped.
  • Works on a phoneNo app needed — lessons run in the browser on a phone or computer.
  • Quizzes as you learnAs soon as a topic ends, a question pops up right on the animated screen — answer it, see instantly if you're right, then move on to the next topic.

Contents

The whole book, chapter by chapter

Every chapter of the Class 9 Physics textbook, in the book's own order. Chapters still being made say “coming soon” and fill in as their lessons are added.

  1. Chapter 1Physical Quantities and Their Measurement9 lessons · 26 minFree demo inside
    1. The chapter at a glanceInteractive lesson · 0:50 minFree demo
    2. 1.1 PhysicsInteractive lesson · 1:17 min
    3. 1.2 Scope of PhysicsInteractive lesson · 1:19 min
    4. 1.3 Development of PhysicsInteractive lesson · 5:48 min
    5. 1.4 Objectives of PhysicsInteractive lesson · 3:55 min
    6. 1.5 Physical Quantities and Their MeasurementInteractive lesson · 3:53 min
    7. 1.6 Measuring InstrumentsInteractive lesson · 3:44 min
    8. 1.7 Error and Accuracy of MeasurementsInteractive lesson · 2:52 min
    9. Chapter 1: Practice Questions and SolutionsInteractive lesson · 2:26 min
  2. Chapter 2Motion12 lessons · 27 minFree demo inside
    1. The chapter at a glanceInteractive lesson · 0:42 minFree demo
    2. 2.1 Rest and MotionInteractive lesson · 2:00 min
    3. 2.2 Different Types of MotionInteractive lesson · 2:29 min
    4. 2.3 Scalar and Vector QuantitiesInteractive lesson · 1:31 min
    5. 2.4 Distance and DisplacementInteractive lesson · 1:52 min
    6. 2.5 Speed and VelocityInteractive lesson · 2:27 min
    7. 2.6 AccelerationInteractive lesson · 2:21 min
    8. 2.7 Equations of MotionInteractive lesson · 3:30 min
    9. 2.8 Laws of Falling BodiesInteractive lesson · 2:51 min
    10. Try It: Motion and GraphsInteractive lesson · 2:07 min
    11. Investigations: Speed on a Slope, a Motion Game, Vehicle SpeedsInteractive lesson · 2:52 min
    12. Chapter 2: Practice Questions and SolutionsInteractive lesson · 2:02 min
  3. Chapter 3Force11 lessons · 29 minFree demo inside
    1. The chapter at a glanceInteractive lesson · 0:40 minFree demo
    2. 3.1 Inertia and Concept of Force: Newton's First Law of MotionInteractive lesson · 2:59 min
    3. 3.2 Nature of Fundamental ForcesInteractive lesson · 2:30 min
    4. 3.3 Balanced and Unbalanced ForcesInteractive lesson · 1:39 min
    5. 3.4 MomentumInteractive lesson · 2:06 min
    6. 3.5 CollisionInteractive lesson · 2:51 min
    7. 3.6 Effect of Force on Motion: Newton's Second Law of MotionInteractive lesson · 3:04 min
    8. 3.7 Gravitational ForceInteractive lesson · 4:01 min
    9. 3.8 Newton's Third Law of MotionInteractive lesson · 2:46 min
    10. 3.9 Frictional ForceInteractive lesson · 4:12 min
    11. Chapter 3: Practice Questions and SolutionsInteractive lesson · 2:26 min
  4. Chapter 4Work, Power and Energy11 lessons · 45 minFree demo inside
    1. The chapter at a glanceInteractive lesson · 0:44 minFree demo
    2. 4.1 WorkInteractive lesson · 4:04 min
    3. 4.2 EnergyInteractive lesson · 2:51 min
    4. 4.3 Different Forms of EnergyInteractive lesson · 10:08 min
    5. 4.4 Sources of EnergyInteractive lesson · 6:23 min
    6. 4.5 Conservation and Conversion of EnergyInteractive lesson · 5:51 min
    7. 4.6 Relation between Mass and EnergyInteractive lesson · 3:36 min
    8. 4.7 PowerInteractive lesson · 2:36 min
    9. 4.8 EfficiencyInteractive lesson · 2:57 min
    10. Investigation 4.01: Physical PowerInteractive lesson · 2:19 min
    11. Chapter 4: Practice Questions and SolutionsInteractive lesson · 3:11 min
  5. Chapter 5States of Matter and Pressure9 lessons · 45 minFree demo inside
    1. The chapter at a glanceInteractive lesson · 0:51 minFree demo
    2. 5.1 PressureInteractive lesson · 3:49 min
    3. 5.2 DensityInteractive lesson · 6:17 min
    4. 5.3 Pressure in LiquidsInteractive lesson · 11:31 min
    5. 5.4 Air PressureInteractive lesson · 7:18 min
    6. 5.5 ElasticityInteractive lesson · 5:23 min
    7. 5.6 The three States of Matter: Solid, Liquid and GasInteractive lesson · 5:10 min
    8. Do it yourself: the density of a solidInteractive lesson · 1:59 min
    9. Chapter 5: Practice Questions and SolutionsInteractive lesson · 2:30 min
  6. Chapter 6Effect of Heat on Matter9 lessons · 35 minFree demo inside
    1. The chapter at a glanceInteractive lesson · 0:55 minFree demo
    2. 6.1 Heat and TemperatureInteractive lesson · 3:29 min
    3. 6.2 Thermometric Properties of MatterInteractive lesson · 5:53 min
    4. 6.3 Thermal Expansion of MatterInteractive lesson · 9:19 min
    5. 6.4 Effect of Heat in Change of StateInteractive lesson · 5:01 min
    6. 6.5 Specific HeatInteractive lesson · 2:04 min
    7. 6.6 Fundamental Principles of CalorimetryInteractive lesson · 4:03 min
    8. 6.7 Effect of Pressure on Melting Point and Boiling PointInteractive lesson · 1:58 min
    9. Chapter 6: Practice Questions and SolutionsInteractive lesson · 2:40 min
  7. Chapter 7Waves and Sound5 lessons · 31 minFree demo inside
    1. The chapter at a glanceInteractive lesson · 0:48 minFree demo
    2. 7.1 Simple Harmonic MotionInteractive lesson · 4:12 min
    3. 7.2 WavesInteractive lesson · 9:24 min
    4. 7.3 Sound WavesInteractive lesson · 13:38 min
    5. Chapter 7: Practice Questions and SolutionsInteractive lesson · 2:57 min
  8. Chapter 8Reflection of Light10 lessons · 37 minFree demo inside
    1. The chapter at a glanceInteractive lesson · 0:54 minFree demo
    2. 8.1 Nature of LightInteractive lesson · 3:37 min
    3. 8.2 ReflectionInteractive lesson · 5:50 min
    4. 8.3 MirrorsInteractive lesson · 7:08 min
    5. 8.4 Spherical MirrorsInteractive lesson · 0:48 min
    6. 8.5 Convex MirrorsInteractive lesson · 4:32 min
    7. 8.6 Concave MirrorsInteractive lesson · 7:41 min
    8. 8.7 MagnificationInteractive lesson · 0:49 min
    9. 8.8 Uses of MirrorsInteractive lesson · 3:27 min
    10. Chapter 8: Practice Questions and SolutionsInteractive lesson · 2:28 min
  9. Chapter 9Refraction of Light6 lessons · 41 minFree demo inside
    1. The chapter at a glanceInteractive lesson · 1:03 minFree demo
    2. 9.1 Refraction of LightInteractive lesson · 9:55 min
    3. 9.2 Total Internal ReflectionInteractive lesson · 8:04 min
    4. 9.3 Uses of RefractionInteractive lesson · 4:22 min
    5. 9.4 Types of LensesInteractive lesson · 13:48 min
    6. Chapter 9: Practice Questions and SolutionsInteractive lesson · 3:24 min
  10. Chapter 10Static Electricity11 lessons · 44 minFree demo inside
    1. The chapter at a glanceInteractive lesson · 1:04 minFree demo
    2. 10.1 ChargeInteractive lesson · 4:40 min
    3. 10.2 Static Electricity due to FrictionInteractive lesson · 2:20 min
    4. 10.3 Electrical InductionInteractive lesson · 6:43 min
    5. 10.4 Electric ForceInteractive lesson · 6:53 min
    6. 10.5 Electric FieldInteractive lesson · 4:00 min
    7. 10.6 Electric PotentialInteractive lesson · 3:59 min
    8. 10.7 CapacitorInteractive lesson · 2:53 min
    9. 10.8 Uses of Static ElectricityInteractive lesson · 7:06 min
    10. Investigation 10.01: Friction and InductionInteractive lesson · 1:35 min
    11. Chapter 10: Practice Questions and SolutionsInteractive lesson · 3:07 min
  11. Chapter 11Current Electricity9 lessons · 49 minFree demo inside
    1. The chapter at a glanceInteractive lesson · 0:46 minFree demo
    2. 11.1 Electric CurrentInteractive lesson · 8:31 min
    3. 11.2 Relationship between Potential Difference and ElectricityInteractive lesson · 17:39 min
    4. 11.3 Electric PowerInteractive lesson · 4:22 min
    5. 11.4 Electrical SupplyInteractive lesson · 3:28 min
    6. 11.5 Safe Use of ElectricityInteractive lesson · 4:48 min
    7. 11.6 Household Electric Circuit DiagramInteractive lesson · 2:48 min
    8. Do it: analysing the circuits of Fig 11.18Interactive lesson · 3:21 min
    9. Chapter 11: Practice Questions and SolutionsInteractive lesson · 3:12 min
  12. Chapter 12Magnetic Effect of Current5 lessons · 22 minFree demo inside
    1. The chapter at a glanceInteractive lesson · 1:02 minFree demo
    2. 12.1 MagnetInteractive lesson · 1:42 min
    3. 12.2 Magnetic Effects of CurrentInteractive lesson · 9:04 min
    4. 12.3 Electromagnetic InductionInteractive lesson · 7:45 min
    5. Chapter 12: Practice Questions and SolutionsInteractive lesson · 2:49 min
  13. Chapter 13Radioactivity and Electronics6 lessons · 25 minFree demo inside
    1. The chapter at a glanceInteractive lesson · 0:53 minFree demo
    2. 13.1 RadioactivityInteractive lesson · 11:44 min
    3. 13.2 Development of ElectronicsInteractive lesson · 4:04 min
    4. 13.3 Analog & Digital ElectronicsInteractive lesson · 2:55 min
    5. 13.4 SemiconductorInteractive lesson · 3:26 min
    6. Chapter 13: Practice Questions and SolutionsInteractive lesson · 1:57 min

Questions

What you'll want to know first

More questions
Are the lessons videos?

No. The Physics lessons are interactive, built with animation and a Bangla voice-over. They open in the browser on a phone or computer.

Can I try before enrolling?

Yes. Lessons marked “free demo” are open to everyone — no login needed.

Does it follow the syllabus?

Yes. The lessons follow the chapters of the Class 9 Physics textbook, in the book's order.

How do I pay?

Send Money with bKash, Nagad or Rocket and submit the transaction ID (TrxID). Once we verify it, every lesson opens.

How long can I watch the lessons?

The enrol box shows how long access lasts. Within that time, watch as often as you like.