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2.8 Forces and Newton's laws

2.8 Forces and Newton's laws

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Question 16

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

A particle of mass 5 kg rests on a smooth horizontal floor.

A force of magnitude P P\,P newtons is applied to the particle, acting vertically upwards.

a.

Given that P=20P = 20P=20, find the magnitude of the normal reaction of the floor on the particle.

[2]
b.

Find the value of P P\,P for which the particle is on the point of leaving the floor.

[1]
c.

Given instead that P=69P = 69P=69, find the magnitude and direction of the acceleration of the particle.

[2]
Markscheme

2.8 Forces and Newton's laws Questions

  1. A Level
  2. /Maths
  3. /2.8 Forces and Newton's laws

35 exam-style questions on WJEC A Level Maths 2.8 Forces and Newton's laws, covering 2.8.1 Forces and Newton's laws, 2.8.2 Forces and Newton's laws, 2.8.3 Forces and Newton's laws, 2.8.4 Forces and Newton's laws, 2.8.5 Forces and Newton's laws, and 2.8.6 Forces and Newton's laws. Each one has a worked solution and a mark scheme showing where the marks go.

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