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.
42 exam-style questions on WJEC A Level Maths 4.10 Moments (A-level only), covering 4.10.1 Moments (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.