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Phy S.5

The document outlines the examination paper for the Uganda Advanced Certificate of Education in Physics for S.5, consisting of four items covering topics such as calibration of weighing scales, highway safety engineering, sprinter performance analysis, and optical principles. Each item includes specific tasks requiring calculations and explanations related to physics concepts. The exam emphasizes the application of theoretical knowledge to practical engineering and scientific problems.

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nanangwemasitula70
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311 views2 pages

Phy S.5

The document outlines the examination paper for the Uganda Advanced Certificate of Education in Physics for S.5, consisting of four items covering topics such as calibration of weighing scales, highway safety engineering, sprinter performance analysis, and optical principles. Each item includes specific tasks requiring calculations and explanations related to physics concepts. The exam emphasizes the application of theoretical knowledge to practical engineering and scientific problems.

Uploaded by

nanangwemasitula70
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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UGANDA ADVANCED CERTIFICATE OF EDUCATION

END OF TERM 1 EXAMINATIONS 2025


PHYSICS
S.5
2 HOURS

INSTRUCTIONS
This paper consists of four examination items.
Attempt all items.
Begin each item on a fresh page.
Be neat.
Item 1
You are working as a design engineer at a manufacturing company.
Your team is developing new high precision weighing scales that will
be used in laboratories to measure small masses accurately. The
device must be calibrated correctly to ensure precision in its
measurements. Before proceeding with the design, you need to
verify the consistency of formulas used in the calculation.
Tasks
a. Identify the fundamental and derived physical quantities
required in the calibration of the weighing scale.
b. Use dimensional analysis to check whether the following
equations used in scale design are dimensionally
consistent.
The force acting on the mass. F = mg
c. The oscillation period of the scale’s pan. T¿ 2 π
√ l
g
why the dimensional analysis is crucial in verifying these
Explain

equations before building the prototype.


Item 2
You are a highway safety engineer designing an emergency escape
ramp from runway trucks. A 10,000kg truck moving downhill at
30ms-1 must stop safely using the ramp, which is 500m long and has
a gravel surface providing friction.
Task

©Physics Department 2025 1


a. Calculate the minimum deceleration needed for the truck
to stop within 500m distance.
b. Determine the time required for the truck to come to a
complete stop.
c. Explain how the choice of gravel, sand or other surfaces
affects the stopping distance.
d. Discuss real world factors like brake failure and weather
conditions that impact the design.
Item 3.
You are a coach analysing a sprinter’s 100meter dash. The sprinter
starts from rest and accelerates at 2.3ms-1 for the first 4 seconds
then continues at a constant velocity until the finishing line.
Task
a. Calculate the maximum velocity the sprinter reaches.
b. Determine the total time the sprinter takes to
complete the race.
c. Explain how reaction time and running technique
affect the overall performance.
Item 4.
In S.5 class, there is a hole on the roof where light rays usually pass
through at mid-day. A stubborn student used a mirror to direct light
to different learners sitting at different positions. Upon filling their
complaint, the head boy is wondering the relationship between the
angle of rotation of the mirror and the angle of deviation of the
reflected ray.
Tasks
a. Use a derivation to explain to the head boy that the
angle of deviation of the reflected ray is twice the
angle of rotation of the mirror.
b. The teacher of Physics said that what this stubborn
boy was doing can be applied either in optical
galvanometer or sextant. Explain how any of the
two devices work.
END

©Physics Department 2025 2

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