4.3.90 - Centripetal force requirement

Understand that a resultant centripetal force is required to produce and maintain circular motion.

Use - centripetal force requirement to connect the rule to the data and decision in the question.

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

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

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