Lekai’s Internal Assessment on Pendulum Oscillations

As part of the IB Diploma Programme, Year 12 and 13 students in DP Physics HL are required to complete their Internal Assessment (IA) — a rigorous individual investigation that represents 20% of their final grade. This task challenges students to apply their accumulated knowledge, creativity, and analytical skills to design and carry out an original experiment. This year, our DP HL Physics student Lekai impressed everyone with his dedication and curiosity as he explored the fascinating relationship between the period of a pendulum and the angle of its oscillation.

For his investigation, Lekai set out to determine how the pendulum’s swing duration changes when varying the initial release angle. To achieve this, he conducted an extensive experiment, testing 18 different angles with five trials each, ensuring the reliability and precision of his results. What made his work stand out was not only the consistency and accuracy of his measurements but also his ingenuity in adapting his setup. As challenges arose during data collection, he refined his apparatus—eventually building a custom angle structure mounted on the wall to measure and control the angles more effectively.

Throughout the process, Lekai demonstrated remarkable problem-solving skills and a clear understanding of experimental physics. His work showcased the essence of the IB learner profile: being inquirer, thinker, and reflective. The experiment itself may seem simple at first glance, but it required a deep grasp of kinematics, energy conservation, and trigonometric relationships—concepts that are central to the HL Physics curriculum.

Completing the IA is not just about gathering data; it’s about analyzing, interpreting, and communicating scientific ideas with precision and clarity. Lekai’s ability to combine experimental technique with structured analysis reflects the high standards expected of DP students. As his teacher, I am extremely proud of his perseverance and scientific maturity throughout this process.

Well done, Lekai, for your outstanding effort and commitment to excellence in your Internal Assessment. Your work truly embodies the spirit of the IB Physics HL course and serves as an inspiring example for future students embarking on their own investigative journeys.