Extended essay projects in physics can include topics like the modeling of a physical pendulum, which can be tailored to a student's knowledge level. It's recommended to consult with a tutor for guidance on selecting a suitable topic. Areas of interest could range from the physics of rainbows to the workings of plasma TVs, Nintendo Wii controllers, hybrid cars, fuel cells, regenerative braking, or LEDs. Focusing on a personally interesting subject may enhance engagement and enjoyment in the research process. Selecting a topic that resonates with personal curiosity is crucial for a successful essay.