M2.2.3 - Simple cases of equilibrium

Simple cases of equilibrium of a The lamina may plane lamina. (i) be suspended from a fixed point; (ii) be free to rotate about a fixed horizontal axis; (iii) be put on an inclined plane.

Use simple cases of equilibrium to connect the rule to the data and decision in the question.

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

Example: apply simple cases of equilibrium to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: Simple cases of equilibrium is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.