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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 21

Two masses M1 M_1\,M1​ of 2 kg and M2 M_2\,M2​ of 4 kg are connected by a light inextensible string. The string passes over a smooth pulley at the top of a rough plane inclined at 45∘ 45^\circ\,45∘ to the horizontal. M1 M_1\,M1​ rests on the plane and M2 M_2\,M2​ hangs freely. The system is released from rest and M1 M_1\,M1​ accelerates up the plane at 2.5 ms-2.

a.

Find the tension in the string

[3]
b.

Find the coefficient of friction between M1 M_1\,M1​ and the plane

[3]
c.

Find the force exerted on the pulley by the string

[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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