A non-uniform rod PQ PQ\,PQ has length 6 m and mass 18 kg. The rod is supported by two light inextensible strings attached at P P\,P and RRR, where PR=5PR = 5PR=5 m.
Given that the tension in the string at P P\,P is twice the tension in the string at RRR.
Find the tension in the string at RRR.
Find the distance of the rod's centre of mass from PPP.
33 exam-style questions on CCEA A Level Maths 4.2.1 Moments (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.