M1.4.2 - Simple applications

Simple applications including the Problems may include motion of two connected particles. (i) the motion of two connected particles moving in a straight line or under gravity when the forces on each particle are constant.; problems involving smooth fixed pulleys and/or pegs may be set (ii) motion under a force which changes from one fixed value to another, e.g. a particle hitting the ground (iii) motion directly up or down a smooth or rough inclined plane.

Use simple applications to connect the rule to the data and decision in the question.

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

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

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