Louis La Minh Hoang

My physics lesson yesterday was all about revisiting the topic of energy, and even though it wasn’t one of the super-advanced sessions, it was still a really important one. Energy is one of those core ideas that keeps showing up everywhere in physics—mechanics, electricity, heat, waves—so getting the fundamentals perfectly clear actually makes the harder topics much easier later on.

We went over the different forms of energy again, focusing mainly on kinetic, gravitational potential, elastic potential, and the idea of mechanical energy in general. Even though I already knew the formulas, the real purpose of the revision was learning how to apply them quickly and accurately in different scenarios. For example, we practiced switching between energy states—like how potential energy becomes kinetic energy as something falls, or how work done transforms into internal energy through friction.

Most of the lesson centred on solving classic energy questions: objects sliding down inclines, balls thrown upward, springs being compressed, and simple system energy transfers. Even though the math wasn’t extremely hard, the revision helped reinforce the idea that energy problems are really about understanding processes, not just plugging formulas into equations.

We also revisited the principle of conservation of energy and practiced identifying where energy could be “lost” to surroundings through heat or sound. Even in the easy questions, getting used to tracking every form of energy helps build the logical habits needed for more complex physics later on.

Overall, the revision wasn’t difficult, but it was solid, refreshing, and surprisingly helpful. It felt like tightening the foundation so the advanced lessons that come later will make even more sense.