Optional extension
A magnet force is inversely proportional to the square of distance. It is \(18\) N at one distance. Find it when the distance is tripled.[3]
680+ questions here come with free worked solutions. A free account saves your questions and progress; this one needs a course plan.
Create a free account to practise similar questions.
Need help? Join our E-Maths tuition for O-Level success.
Learn more