Why physics needs a diagram
Most physics questions are really a picture with numbers on it. Get the picture right and the equation almost writes itself. Litu starts every explanation by drawing the situation, then adds each force, current or ray at the moment it talks about it.
When a formula appears, Litu can zoom in on the one symbol that matters, like the square in v², and say what it means for the answer.
Questions you can ask
- Which forces act on a box on a ramp?
- Why does current split in a parallel circuit?
- How does a lens bend light?
- What's the difference between speed and velocity?
- Why does a ball thrown up come back down at the same speed?
Topics Litu covers
- Mechanics: motion graphs, equations of motion, Newton's laws, moments, work, energy and power, projectiles.
- Electricity: current, voltage and resistance, Ohm's law, series and parallel circuits, electrical energy.
- Waves and optics: wave properties, sound, reflection, refraction, lenses and mirrors.
- Heat and matter: temperature, specific heat capacity, gas laws, pressure.
For WAEC, NECO and JAMB physics
Litu explains the topics on the senior secondary physics syllabus with the diagrams examiners expect you to draw. Snap a past question and it redraws the setup on the board before teaching the method. See exam prep with Litu.
How a physics lesson goes
- Describe the situation or snap the question.
- Litu draws it, labels every quantity, and builds the equation from the picture.
- Cut in whenever you're lost; it picks up from the part that tripped you.