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3.3 R: Forces and Newton's laws

3.3 R: Forces and Newton's laws

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Question 9

A block of weight 40 N lies on a rough board inclined at an angle of 10∘ 10^\circ\,10∘ to the horizontal. A horizontal force of 20 N acts on the block and the block is in equilibrium on the point of slipping up the board.

a.

Find the coefficient of friction between the block and the board.

[7]
b.

The 20 N force is removed. Determine whether or not the block moves.

[4]
Markscheme

3.3 R: Forces and Newton's laws Questions

  1. A Level
  2. /Maths
  3. /3.3 R: Forces and Newton's laws

139 exam-style questions on AQA A Level Maths 3.3 R: Forces and Newton's laws, covering 3.3.1 Concept of a force and Newton's first law, 3.3.2 Newton's second law, 3.3.3 Weight and motion under gravity, 3.3.4 Newton's third law and equilibrium, 3.3.5 Addition of forces and resultants (A-level only), and 3.3.6 Friction (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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