Candidate signature
I declare this is my own work.
2023 AQA A-level PHYSICS 7408/3BC Paper 3 Section B Engineering physics Question Paper & Mark
scheme (Merged) June 2023 [VERIFIED]
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.
• Fill in the boxes at the top of this page. 1
• 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.
• A Data and Formulae Booklet is provided as a loose insert.
*JUN2374083BC01*
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]
*02*
IB/M/Jun23/7408/3BC
, 3
Do not write
outside the
An electric motor drives a machine that punches out plates from a long strip of box
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 ►
*03*
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
*04*
IB/M/Jun23/7408/3BC
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Freemann. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.80. You're not tied to anything after your purchase.
