Home of the Uedu platformShow a desktop notification when the AI TA finishes replying
Notify me when classmates post messages in the forum
Play an alert sound whenever there is a new notification
Link senior secondary physics and university general physics into one continuous learning pathway.
Yodo Physics is the physics knowledge reader under Uedu interdisciplinary general education, deliberately spanning senior secondary physics and university general physics. For the same topic, it first introduces the subject from the perspective and intuition of senior secondary school, then extends to the mathematical depth of general physics, so the transition is no longer fragmented.
The topic lists of the two stages overlap to a very high degree — mechanics, waves, thermodynamics, electromagnetism, optics, modern physics: upper secondary school and general physics almost trace the same map. That is why many people have the impression that "I learned this in secondary school". But the depth and mode of thinking required for the same topic are entirely different in the two stages: rather than learning something new, it is more like enlarging the same map from low resolution to high resolution. The table below lays out the fundamental differences between the two:
| Orientation | Secondary school physics | University General Physics |
|---|---|---|
| Mathematics tools | Mainly algebra, trigonometry and geometry, deliberately avoiding calculus | Calculus is the basic language: instantaneous quantities use differentiation, cumulative quantities use integration, and electromagnetic fields use vector calculus (gradient, divergence, curl) |
| Data subject | Idealised special cases: constant force, constant acceleration, one-dimensional motion, uniform field, point charge | General case: variable force, arbitrary path, multidimensional vectors, arbitrary charge distribution; establish the equation first, then solve it |
| Status of the formula | Formulas are mostly given directly; the key is to apply them correctly | The formula is derived from basic principles; the key is understanding its source, conditions of application and limits of validity |
| Definitions of physical quantities | Common average quantities, such as speed = displacement/time | Precisely define instantaneous quantities using limits and derivatives, such as v = dx/dt, and strictly distinguish between average and instantaneous |
| Data and error | Measurement is often treated as a single value, at most to the smallest scale division of the instrument | Each measurement carries uncertainty; repeated measurement, statistics and error propagation are the first lesson to establish from the outset |
| Knowledge Organisation | Phenomena are mostly taught as separate units (electricity, magnetism and light each forming its own unit) | Towards unity and abstraction: by centring on the 'field' and conservation laws, Maxwell's equations brought electricity, magnetism and light together into one theory |
| Assessment and thinking | Standard question type, emphasising speed and accuracy | Open-ended questions, with an emphasis on modelling and derivation, and the two-way skill of translating physics into mathematics, then reading mathematics back into physics |
| Course purpose | Scientific literacy and progression to higher education; building qualitative to semi-quantitative understanding of natural phenomena | The common foundation of training in science and engineering, paving the way for subsequent classical mechanics, electromagnetism, thermodynamics and quantum mechanics |
If I can only point to one thing, it is thedifferent level of questioning. In senior secondary physics, the main questions are ' what is it and how do you calculate it ' — given a situation, choose the correct formula and work out the answer. University introductory physics goes further and asks ' why, where does it come from, and where are the limits ' — the same conclusion should be derivable from more fundamental principles, and you should be able to explain under what conditions it holds and when it breaks down.
Calculus is often treated as the dividing line between the two, but it is in fact a "tool" rather than an "end". The real shift is this: physics is no longer a set of formulae to memorise, but a way of reasoning that starts from a few principles and works through the mathematics step by step to derive the result. Once you see this level, the intuition built in secondary school will not be wasted; instead, it will become the fulcrum that supports the mathematical depth of introductory physics — and that is precisely why Uedu Physics deliberately spans two stages, with every reading piece clearly marked by level.
Classification is split by physics topic to cover the whole introductory physics landscape: mechanics, oscillations and waves, fluids, heat and thermodynamics, electromagnetism, light and optics, modern physics. The scope is broad, and the text will continue to be expanded.
The difficulty in Physics often lies in what cannot be seen — electric fields, electromagnetic waves, quantum phenomena. Each reading is accompanied by conceptual diagrams (generated with GPT Image 2) to visualise abstract concepts, helping readers build intuition first and understand the formulae afterwards. The illustrations are teaching aids, not precise engineering drawings; for deeper study, please refer to the textbook.