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3.4 S: Moments (A-level only)

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Question 6

In this question use g=9.8g = 9.8g=9.8 m s−2^{-2}−2.

A uniform steel girder AB AB\,AB has length 11 m and mass 18 kg. The girder is supported in a horizontal position by a single pivot at the point PPP, where AP=4AP = 4AP=4 m.

To maintain equilibrium, a ballast weight of W W\,W newtons is attached to the girder at the end AAA.

a.

Find the value of WWW, giving your answer in terms of ggg.

[3]
b.

State how the assumption that the girder is uniform has been used in your solution.

[1]
Markscheme

3.4 S: Moments (A-level only) Questions

  1. A Level
  2. /Maths
  3. /3.4 S: Moments (A-level only)

53 exam-style questions on AQA A Level Maths 3.4 S: Moments (A-level only), covering 3.4.1 Moments in static contexts (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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