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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 39

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

A block of mass 5 kg is projected vertically upwards from ground level with speed 14 m s−1^{-1}−1.

As the block moves upwards it experiences air resistance of constant magnitude 7 N.

a.

Find the magnitude of the deceleration of the block while it is rising.

[3]
b.

Find the greatest height above the ground reached by the block.

[2]
c.

The air resistance on the block as it falls also has constant magnitude 7 N. Find the speed of the block as it returns to the ground.

[3]
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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