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AQA 2023 A-level PHYSICS Paper 3 Section B Engineering physics Question Paper + Mark scheme [MERGED] June 2023 $9.24
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AQA 2023 A-level PHYSICS Paper 3 Section B Engineering physics Question Paper + Mark scheme [MERGED] June 2023

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AQA 2023 A-level PHYSICS Paper 3 Section B Engineering physics Question Paper + Mark scheme [MERGED] June 2023 Materials For this paper you must have:  a pencil and a ruler  a scientific calculator  a Data and Formulae Booklet  a protractor. Instructions  Use black ink or blac...

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  • May 28, 2024
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AQA 2023 A-level PHYSICS Paper 3 Section B Engineering physics Question Paper + Mark scheme [MERGED] June 2023


Please write clearly in block capitals.

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I declare this is my own work.



A-level
PHYSICS
Paper 3
Section B Engineering physics

Thursday 15 June 2023 Morning Time allowed: The total time for
both sections of this paper is
Materials
For this paper you must have: 2 hours. You are advised to
 a pencil and a ruler spend approximately
 a scientific calculator 50 minutes on this section.
 a Data and Formulae Booklet
 a protractor.
For Examiner’s Use
Instructions Question Mark
 Use black ink or black ball-point pen.
1
 Fill in the boxes at the top of this page.
 Answer all questions. 2
 You must answer the questions in the spaces provided. Do not write 3
outside the box around each page or on blank pages. 4
 If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s). 5
 Do all rough work in this book. Cross through any work you do not want TOTAL
to be marked.
 Show all your working.

Information
 The marks for questions are shown in brackets.
 The maximum mark for this paper is 35.
 You are expected to use a scientific calculator where appropriate.




IB/M/Jun23/E7 7408/3BC

, 2
Do not write
outside the
Section B box


Answer all questions in this section.


0 1 . 1 One equation used in translational dynamics is:

force = mass × acceleration

State in words the equivalent equation used in rotational dynamics.
[2 marks]




Figure 1 shows two identical uniform plates A and B. The axis of rotation of each
plate is shown.

Figure 1




0 1




. 2 State and explain which plate has the greater moment of inertia about its axis
of rotation.
[2 marks]




IB/M/Jun23/7408/3BC

, 3
Do not write
outside the
box
An electric motor drives a machine that punches out plates from a long strip of
sheet metal. The motor runs continuously and is fitted with a flywheel.
Figure 2 shows how the angular velocity ω of the flywheel varies with time t.

Figure 2




Table 1 describes the sequence for the machine after it has been brought up to
speed ωA.

Table 1


A The punching operation starts.

A to B The flywheel transfers some of its energy during the punching operation.

B to C The flywheel is again brought up to speed ωA by the motor.

C The next punching operation starts.



0 1 . 3 A new flywheel with a greater moment of inertia is fitted in place of the original
flywheel. The motor torque is constant and the same as before.

Sketch on Figure 2 a graph showing how the angular velocity varies with time for the
machine fitted with the new flywheel.

Assume that:

 the punching operation starts at the same angular speed ωA
 the same quantity of energy is transferred when punching the metal sheet.
[2 marks]




Question 1 continues on the next page




Turn over ►


IB/M/Jun23/7408/3BC

, 4
Do not write
outside the
0 1 . 4 Explain one difference between your graph and the original graph. box

[1 mark]




7




IB/M/Jun23/7408/3BC

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