4.3.85 - Elastic and inelastic collisions

Determine whether a collision is elastic or inelastic.

Use - elastic and inelastic collisions to connect the rule to the data and decision in the question.

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

Example: apply - elastic and inelastic collisions to one small, clearly defined case, show the key step or comparison, and explain the result in words.

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