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Wednesday 22 May 2024 – Afternoon
AS Level Physics A
H156/02 Depth in physics
Time allowed: 1 hour 30 minutes
You must have:
the Data, Formulae and Relationships Booklet
a ruler (cm/mm)
You can use:
a scientific or graphical calculator
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
INSTRUCTIONS
Last name
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 70.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 24 pages.
ADVICE
• Read each question carefully before you start your answer.
Turn over
, 2
Answer all the questions.
1 In space, Asteroid A, called Dimorphos travels at constant speed in a circle around a
larger Asteroid B, called Didymos. The diagram shows Asteroid A at position P.
Asteroid B
Asteroid A Didymos
Dimorphos P
r0 = 1.19 km
The distance r0 between Asteroid A and Asteroid B is 1.19 km.
The time T0 for Asteroid A to travel once around Asteroid B is 4.29 × 104 s (11 hours 55 minutes).
(a) Calculate the average speed v, in m s–1, of Asteroid A.
v =..................................................m s–1 [2]
(b) Explain one similarity and one difference between the velocity of Asteroid A at P and its
velocity six hours later.
, 3
(c) In 2022, the NASA DART mission impact caused Asteroid A to follow a different circular
path round Asteroid B.
The new time TN for Asteroid A to travel once around Asteroid B was reduced by 30 minutes.
(i) Show that the ratio
new time to travel around Asteroid B TN
original time to travel around Asteroid B T0
is approximately 0.958.
[1]
(ii) The relationship between the distance r from the centre of Asteroid B to the centre of Asteroid
A and the time T for Asteroid A to travel around Asteroid B is
r3∝T2
Calculate the new distance rN from the centre of Asteroid B to the centre of Asteroid A.
Give your answer in km and to 3 significant figures.
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