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...
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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