A non-uniform rod AB AB\,AB has length 4 m and mass 10 kg. It is held horizontally by vertical strings attached at A A\,A and BBB. The tension at A A\,A is three times the tension at BBB.
Find the tension at BBB. Use g=9.8g=9.8g=9.8 m s−2^{-2}−2.
Find the distance of the rod's centre of mass from AAA.
53 exam-style questions on OCR A Level Maths 3.4 Moments (A-level only), covering 3.4.1 Moment of a force (A-level only), 3.4.2 Equilibrium of a rigid body (A-level only), and 3.4.3 Moments in static contexts (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.