1.3.20 - Conservation of energy

Know, and understand how to apply, the principle of conservation of energy including use of work done, gravitational potential energy and kinetic energy.

Use - conservation of energy to connect the rule to the data and decision in the question.

This matters because - conservation of energy determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - conservation of energy to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Conservation of energy is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.