A uniform steel girder, ABABAB, has a length of 11 metres and a mass of 18 kilograms. The girder is supported in a horizontal position by a single pivot at point PPP, where AP=4AP = 4AP=4 metres. To maintain equilibrium, a ballast weight of W W\,W newtons is attached to the girder at end AAA.
Determine the value of W W\,W in terms of ggg.
State how the assumption that the girder is uniform has been applied in your solution.
26 exam-style questions on OCR (MEI) A Level Maths 3.6.2 Equilibrium of a rigid body (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.