Sinha Foundation Physics
Physics, from First Principles
Undergraduate physics, taught properly. Rich animations, full derivations, and worked problems, built for students who want the real thing. No hand-waving. Free, for everyone.
- 20lectures live
- 9h 15mof video
- 795problems worked
- FAQ
In progress
The Grammar of Nature
Symbols
4 lectures
1Complex Numbers, Euler's Formula, De Moivre & PhasorsWhy does a spring keep time with a circle?25:32
2Taylor Series, Convergence & Binomial ApproximationHow much longer does a wide swing take?27:37
3Linear Algebra, Matrices, Determinants & Change of BasisNewWhy is every matrix just a move?25:31- 4Eigenvectors and Normal ModesNext
Fields
4 lectures- 5Partial Derivatives and the Gradient
- 6Multiple Integrals and the Jacobian
Complete
Classical Mechanics
Statics to Kepler
Foundations
4 lectures
1Dimensional Analysis, Estimation & Order of MagnitudeHow did a photo leak an atomic secret?18:00
2Statics, Friction, Tension, Normal Force & Capstan EquationHow do two turns of rope hold a ship?30:54
3Torque, Levers, Rotational Equilibrium & Center of GravityHow far can a book stack lean?28:53
4Newton's Laws, Free Body Diagrams, Pulleys & Atwood MachineHow can 50 kg hold up 100 kg?31:15
Motion & Oscillation
5 lectures
5Air Resistance, Terminal Velocity & Differential EquationsWhy doesn't rain fall like a bullet?30:25
6Projectile Motion, Motion in a Plane & Circular MotionDropped or fired: which lands first?30:11
7Simple Harmonic Motion, Damped Oscillations & PendulumWhy does one curve rule every wobble?31:09
8Resonance, Driven Oscillations, Forced Vibration & Q FactorHow can a steady note shatter a glass?28:04
9Normal Modes, Coupled Oscillators, Beats & Double PendulumWhy does the swing come home?29:57
Energy
3 lectures
10Work, Kinetic & Potential Energy, Conservation of EnergyWhy does every track give one speed?27:04
11Small Oscillations, Effective Spring Constant & StabilityWhy is every valley the same curve?29:17
12Gravitation, Shell Theorem, Escape Velocity & Tidal ForcesIs gravity stronger inside the Earth?28:29
Momentum
3 lectures
Orbits
2 lectures
388problems worked
Irodov, Part I: Mechanics
Every problem in the part, restated plainly and solved one step at a time.
- Kinematics
- Dynamics
- Conservation Laws
- Gravitation
- Solid Bodies
- Elasticity
- Hydrodynamics
- Relativistic Mechanics
Problem library
Learn to solve, not to look up the answer
Irodov's Problems in General Physics, restated in plain language and worked from first principles. Every solution reveals one step at a time, says why each move is made, checks its units and limits, and closes with what to carry forward.
- Restated
- Clear statements in our own words, no ambiguity
- Step by step
- Reveal one move at a time, or skip to the answer
- Why, not just what
- The reason for each move, inset in the step
- Checked
- Units, limits, and a remark on what to carry forward
difficulty
How much work the solution takes: 1 is a one-liner, 5 is an evening.
uniqueness
How far it strays from the textbook route: 1 is standard, 5 is one of a kind.
Click a bar to open every problem at that rating.
Off the beaten path
Solutions you will not find in the back of the book1 of 10
The steep climbs
For the week you want to be stretched1 of 6
Free, in full, for everyone