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Question 26

A non uniform rod AB AB\,AB has length 120 cm and mass 15 kg. A mass of 5 kg is placed on the rod at CCC, where AC=40AC = 40AC=40 cm. The rod is held in horizontal equilibrium by two light inextensible strings attached at A A\,A and BBB.

Diagram of a horizontal rod AB of length 120 cm with a 5 kg mass at C, where AC is 40 cm.

a.

Given that the tension in the string at A A\,A is 9.8 N greater than the tension in the string at BBB, find the tension in the string at BBB.

[2]
b.

Hence find the distance, to the nearest cm, of the rod's centre of mass from AAA.

[4]
Markscheme

Moments Questions

  1. A Level
  2. /Maths
  3. /Moments

54 exam-style questions on Edexcel A Level Maths Moments, covering 4.1 Moments, 4.2 Resultant Moments, 4.3 Equilibrium, 4.4 Centres of Mass, and 4.5 Tilting. Each one has a worked solution and a mark scheme showing where the marks go.

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