A uniform stone lintel ABABAB, of length 101010 metres, rests horizontally in equilibrium on two smooth temporary supports at points PPP and QQQ. The distance APAPAP is 222 metres and the distance BQBQBQ is 333 metres.
The reaction force on the lintel at PPP is 8g8g8g newtons.
(i) Show that the mass of the lintel is 202020 kilograms.
(ii) Find the reaction force, in terms of ggg, on the lintel at QQQ.
The support at QQQ is moved so that the distance BQ=2BQ = 2BQ=2 metres. The lintel remains horizontally at rest in equilibrium. A worker claims that the reaction force at QQQ remains unchanged. Explain, with a reason, whether this claim is correct.
Practise Edexcel A Level Maths Applications of Forces with exam-style questions for A Level Maths. 47 questions covering Static Particles, Modelling with Statics, Friction and Static Particles, Static Rigid Bodies, Dynamics and Inclined Planes, and Connected Particles 2, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.