M3.3.1 - Variable-force motion in one dimension

Newton’s laws of motion, for a The solution of the resulting equations will be consistent particle moving in one dimension, with the level of calculus in units P1, P2, P3 and P4. when the applied force is variable.; Problems may involve the law of gravitation, i.e. the inverse square law.

Use variable-force motion in one dimension to connect the rule to the data and decision in the question.

This matters because variable-force motion in one dimension determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply variable-force motion in one dimension to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: Variable-force motion in one dimension is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.