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3.6 Rigid Bodies (A-level only)

3.6 Rigid Bodies (A-level only)

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Question 3

A uniform scaffolding plank AB AB\,AB of mass 15 kg and length 6 m is at rest with one end A A\,A on rough horizontal ground and the other end B B\,B against a smooth vertical wall. The coefficient of friction between the plank and the ground is 0.35. The plank makes an angle θ \theta\,θ with the ground.

Given that the plank is on the point of slipping.

a.

Find the magnitude of the frictional force of the ground on the plank.

[2]
b.

Find the value of θ\thetaθ, to 1 decimal place.

[5]
Markscheme

3.6 Rigid Bodies (A-level only) Questions

  1. A Level
  2. /Maths
  3. /3.6 Rigid Bodies (A-level only)

56 exam-style questions on OCR (MEI) A Level Maths 3.6 Rigid Bodies (A-level only), covering 3.6.1 Moment of a force (A-level only), 3.6.2 Equilibrium of a rigid body (A-level only), 3.6.3 Turning effect of forces (A-level only), and 3.6.4 Weight acting through a point (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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