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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 13

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

A particle of mass 5 kg rests in equilibrium on a smooth plane inclined at an angle of 25° 25°\,25° to the horizontal. It is held in place by a force of magnitude P P\,P newtons acting up a line of greatest slope.

a.

Find the value of PPP.

[2]
b.

Find the magnitude of the normal reaction of the plane on the particle.

[2]
c.

State one assumption you have made in modelling the plane as smooth.

[1]
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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