IB Physics HL Extended Essay Example

The student chose a recognisable physics problem and communicated a clear investigative direction from the start.

The student's method includes several thoughtful practical choices, such as repeated trials, measured dimensions, and attempts to reduce observational error.

The student connected the experiment to relevant mechanical ideas rather than relying on a purely descriptive approach.

The student's central question is not fully operationalised, so the reader cannot tell exactly how accuracy is being judged.

The method is relevant but not fully secure, especially where the continuous-rod model is applied to an interlocking LEGO structure.

A second experimental pathway weakens the focus because it is not clearly tied back to the original aim.

The student uses a substantial amount of relevant mechanics vocabulary and equations, including bending moment, torque, centre of mass, and stress.

The student shows a solid understanding of the physical context by linking the LEGO model to the broader chimney problem.

The student generally uses terminology in a way that helps the reader follow the investigation, even when the application is not always perfect.

Some mechanical terms are used imprecisely, especially where shear, torsion, and bending are treated too interchangeably.

Parts of the theoretical model are not fully justified for the LEGO structure, particularly the assumption that a continuous rod analogy is appropriate.

Some formulas and variables are introduced in a way that is mathematically and physically unclear.