1202 Question Bank Physics Form 4

©PAN ASIA PUBLICATIONS

Contents








Must Know iii – x



Chapter 1 Measurement 1 – 14
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NOTES 1
Paper 1 4
Paper 2 9
Reinforcement and Assessment of Science Process Skills for Paper 3 (Practical Test) 13



Chapter 2 Force and Motion I 15 – 36
NOTES 15
Paper 1 17
Paper 2 26
Reinforcement and Assessment of Science Process Skills for Paper 3 (Practical Test) 34




Chapter 3 Gravitation 37 – 48
NOTES
37
Paper 1 40
Paper 2 44




Chapter 4 Heat 49 – 68
NOTES 49
Paper 1 52
Paper 2 60
Reinforcement and Assessment of Science Process Skills for Paper 3 (Practical Test) 66



Chapter 5 Waves 69 – 86
NOTES 69
Paper 1 71
Paper 2 82



Chapter 6 Light and Optics 87 – 106
NOTES 87
Paper 1 90
Paper 2 98
Reinforcement and Assessment of Science Process Skills for Paper 3 (Practical Test) 105



Answers 107 – 126






ii




Contents QBank Physics F4.indd 2 14/01/2022 4:57 PM

MUST


KNOW Mnemonics






Seven Base Quantities Order of Rainbow Colours

To remember the seven base quantities: • To remember the order of colours in the visible light
Length (l) → l spectrum, as seen in a rainbow.
Red → R
Mass (m) → m
3 ©PAN ASIA PUBLICATIONS
Orange → o
Time (t) → t
Yellow → y
Thermodynamic Temperature (T) → T
Green → G.
Electric Current (I) → I
Blue → B
Luminous Intensity (I ) → I Indigo → i
v
Amount of Substance (n) → n Violet → v
lm2t2In Roy G. Biv



Mnemonics (Chapter 1) 1 @ Pan Asia Publications Sdn. Bhd. Mnemonics (Chapter 5) 7 @ Pan Asia Publications Sdn. Bhd.


Graph Plotting Procedures Electromagnetic Spectrum
• In the order of increasing frequency or decreasing
wavelength of electromagnetic waves:
Axes → A
Mnemonic Electromagnetic Waves
Scales → S
Red Radio waves
Plot → P
Martians Microwaves
Curve → C Invaded Infrared

Gradient → G Venus Visible light
Intercept → I Using Ultraviolet
ASP C GI X-ray X-Rays
Guns Gamma rays


Mnemonics (Chapter 1) 3 @ Pan Asia Publications Sdn. Bhd. Mnemonics (Chapter 5) 9 @ Pan Asia Publications Sdn. Bhd.


The Linear Motion Equations of Uniform Characteristics of Image Formed by Concave Lens
Acceleration or Convex Mirror

(uv ats)
u v a t s Linear Motion Equation Virtual → V
3 3 3 3 7 v = u + at
Upright → U
2
2
3 3 7 3 v = u + 2as
Diminished → D
1
3 3 7 3 3 s = (u + v)t
2 VUD
1
3 7 3 3 3 s = ut + at 2
2
7 : Variable not involved
3 : Variable involved

Mnemonics (Chapter 2) 5 @ Pan Asia Publications Sdn. Bhd. Mnemonics (Chapter 6) 11 @ Pan Asia Publications Sdn. Bhd.



Must Know QBank Physics F4.indd 1 14/01/2022 5:08 PM

MUST


KNOW Important Definition







Damping and Resonance Physical Quantities
• Free vibrations are the vibrations of a system at its natural
frequency without external disturbance. Terminology Explanation
Physical quantity Must be measurable
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• Damped vibrations are the vibrations of a system where the
amplitude decreases with time due to resistive forces. Cannot be defined in terms of other
Base quantity
quantities
• Forced vibrations are the vibrations of a system caused by
external alternating forces. Derived from combinations of base
Derived quantity quantities through multiplication or
division or both
• When a periodic force is applied to an oscillating system at
its natural frequency, the oscillating system is said to be at Scalar quantity Has magnitude only
resonance.
Vector quantity Has both magnitude and direction




Important Definition (Chapter 5) 8 @ Pan Asia Publications Sdn. Bhd. Important Definition (Chapter 1) 2 @ Pan Asia Publications Sdn. Bhd.


Fundamentals of Waves and Oscillations Experimental Design
• Oscillation and vibration are repetitive motions about an
equilibrium position in a closed path. Manipulated Variable The variable you will change before
(MV) carrying out the experiment.

• Amplitude is the maximum displacement of an oscillating Responding Variable The variable you will measure in
object from its equilibrium position. (RV) responding to the change in the MV.
Constant Variable Any other variables which could
• Frequency is the number of complete vibrations per second. (CV) affect the outcome of the experiment
Unit of frequency is hertz (Hz). but you set to remain constant
throughout the experiment.
• Period is the time taken for one complete oscillation.
Example: The simple pendulum experiment
MV: Length of pendulum, l = 20.0 cm, 30.0 cm…
• Waves are produced when a system oscillates or vibrates in 70.0 cm
a medium or field. RV: Time taken for 20 complete oscillations
CV: Mass of pendulum bob
Important Definition (Chapter 5) 10 @ Pan Asia Publications Sdn. Bhd. Important Definition (Chapter 1) 4 @ Pan Asia Publications Sdn. Bhd.


Total Internal Reflection and Critical Angle Inertia
• When a ray of light propagates from a denser medium to a • Inertia of an object refers to the reluctance of the object to
less dense medium, total internal reflection is said to occur change its state of rest or motion due to its mass.
when the angle is incidence is greater than the critical angle.
• Inertia is non-physical quantity. It is an attribute only.
• The critical angle, c, is the angle of incidence of light,
moving from a denser medium towards a less dense medium
where the angle of refraction is equal to 90°.
n = 1
sin c









Important Definition (Chapter 6) 12 @ Pan Asia Publications Sdn. Bhd. Important Definition (Chapter 2) 6 @ Pan Asia Publications Sdn. Bhd.



Must Know QBank Physics F4.indd 2 14/01/2022 5:08 PM

MUST


KNOW Important Diagrams







The Heating Curve Interpretation of Graphs
y is inversely proportional to x:
Temperature
y  1
U x
Liquid Gas
and gas y y
S T
Boiling
point Solid and
liquid or
Q R
Melting
point Liquid
Solid
P
1
0 x 0 x
0 Time



Important Diagrams (Chapter 4) 44 @ Pan Asia Publications Sdn. Bhd. Important Diagrams (Chapter 1) 38 @ Pan Asia Publications Sdn. Bhd.


Formation of Virtual Images Ticker Tape Charts

I Length/ cm Length/ cm Length/ cm
I
O
O
F C
P
F
F ©PAN ASIA PUBLICATIONS
Time/ s Time/ s Time/ s
u Uniform Uniform Uniform
u f velocity acceleration decrease
uniformly
f
Conditions: u ˂ f
Image Characteristics: Virtual, Upright, Magnified



Important Diagrams (Chapter 6) 46 @ Pan Asia Publications Sdn. Bhd. Important Diagrams (Chapter 2) 40 @ Pan Asia Publications Sdn. Bhd.


Formation of Image by an Astronomical Telescope Interpretations of Linear Motion Graphs

L
Displacement, s / m Velocity, v / m s -1 Acceleration, a / m s -2
f f
o e
Observer
F , F
o e
I
1 0 0 0
Time, t / s Time, t / s Time, t / s
(a) Object moving with (b) Object moving with (c) Object moving with
uniform velocity uniform acceleration uniform acceleration
Virtual image
Eyepiece lens
at infinity
Objective lens (L )
2
(L )
1
f
L = f + f M = –– o
o e f
e
Important Diagrams (Chapter 6) 48 @ Pan Asia Publications Sdn. Bhd. Important Diagrams (Chapter 2) 42 @ Pan Asia Publications Sdn. Bhd.
Must Know QBank Physics F4.indd 8 14/01/2022 5:09 PM

1
Chapter Measurement





NOTES


1.1 Physical Quantities
S.I. unit Symbol
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1. Physics is the study of space, time, matter and
energy as well as phenomena happening around us. metre m
2. Measurement plays an important role in investigating kilogram kg
natural phenomena and inventing modern equipment
to solve problems in our lives. second s

3. Measurement is a method to determine the value
kelvin K
of a physical quantity. The results of accurate
measurements enable us to make right decisions.
ampere A
4. Physical quantities are quantities that can be
measured, consists of a numerical magnitude and candela cd
a unit.
Magnitude mole mol
Physical
quantity Length = 10 m Unit 7. Derived quantities are physical quantities that are
derived from the mathematical combinations of base
5. All measurement requires a system of units. We quantities through multiplication or division or both.
always express the result of a measurement as a
number (numerical magnitude) multiplied by a unit. 8. Scalar quantity is a physical quantity that can be
The metric system of units considered superior to expressed in terms of its magnitude only.
most other systems of units.
9. Vector quantity is a physical quantity that must be
Example: Length = 10 m means 10 multiplied by
expressed in both magnitude and direction.
the length of one metre
Examples of scalars
6. Base quantities are physical quantities that cannot
be derived from other physical quantities. These Distance Density
base quantities cannot be defined in terms of more
fundamental quantities. Speed Temperature

Base quantity Symbol
Time Energy
Length l
Mass Power
Mass m
Examples of vectors
Time t
Displacement Momentum
Thermodynamic temperature T
Velocity Impulse
Electric current I
Acceleration Weight
Luminous intensity I
v
Force Field strength
Amount of substance n


1




B01 QBank Physics F4.indd 1 10/02/2022 3:44 PM

1.2 Scientific Investigation y

1. Making an inference means interpreting or
explaining factors as a result of an observation.
Example: The period of a simple pendulum is
affected by its length.

2. Hypothesis is a general statement that attempts to
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relate two or more variables.
0 x
Example: The longer the length of a simple
pendulum, the longer its period of oscillation. y = mx

3. Variable is a physical quantity that must be 11. When a straight line that does not pass through the
considered in order to describe an observation.
origin is obtained, the equation that can be deduced is
Example: The period of oscillation of a simple y
pendulum and the length of the simple pendulum.


4. Manipulated variable is a physical quantity whose
values must be determined before the experiment is
carried out.
Example: Length of the simple pendulum.


5. Responding variable is a physical quantity that x
depends on a manipulated variable and is obtained 0
during the experiment.
y = mx + c
Example: The period of oscillation.
This shows that y has a linear relationship with x, and
6. Constant variable is a physical quantity that must be c is the intercept for the line on the y-axis.
fixed throughout the experiment.
12. The gradient of a line is the change in y, Δy, divided
Example: mass of pendulum bob, the gravitational by the change in x, Δx.
acceleration. y

7. Checklist of methods for graph plotting (ASPCGI):
axes, scale, plot, curve, gradient and intercept.
8. A graph represents the average value of the readings ∆y
of an experiment and provides a visual relationship
between variables under investigation. ∆x

9. By analysing information from the graph, we can
find data patterns, the relationship between variables
0 x
involved and to formulate generalisation of a
particular principle or law of physics.
∆y
10. When a straight line that has a positive gradient and Gradient, m = ∆x
that passes through the origin is obtained, the equation
that can be deduced is y = mx. This shows that y is
directly proportional to x, and m is the gradient of the
line.





2




B01 QBank Physics F4.indd 2 10/02/2022 3:44 PM

PAPER 1


Answer all questions.

1.1 Physical Quantities 3. Which of the following is not a derived quantity?
SPM
CLONE A Power
1. Physics is a study of B Charge
A matter and energy C Energy
B nature and living things D Temperature
C measurements in science
D particles and natural phenomena 4. The statement below refers to
SPM
CLONE
All measurement requires a proper system of units
2. Which of the following is a S.I. base unit? for effective communication
A Joule
B Tesla A metric system
C Newton B system International
D Candela C system of scalars and vectors
D system of based and derived units


5. Which of the marks (3) combination explains the correct base or derived quantity? HOTS Analysing
SPM
CLONE
Quantity Magnitude Direction Scalars Vectors
A Base 3 3

B Derived 3 3 3
C Base 3 3 3 3

3
3
Derived
D ©PAN ASIA PUBLICATIONS
–2
6. Metre per second per second (m s ) is a unit 8. Which of the following grouping is correct?
SPM for gravitational strength. Another unit for HOTS Applying
CLONE
gravitational strength is newton per kilogram A
–1
(N kg ). Which statement is correct? Scalars:
HOTS Applying Time
2
–1
–1
A 10 N kg = 10 cm s –2 Distance
B 1.0 N kg = 100 dm s –2 Work done
–1
C 10 N kg = 10 mm s –2 Mass of apple
–1
2
3
–1
D 10 000 N kg = 10 000 m s –2
B
7. Which of the following list is/are made up of Derived quantities:
vectors only? Speed
I Time, force, luminous intensity Weight
II Velocity, momentum, impulsive force Volume of gas
III Work, acceleration, amount of substance Thermodynamic temperature
A II only
B II and III only
C I, II and III
4
Question 4:
SOS TIP Question 6: –2 –1 –1 –2 SOS TIP
S.I. is System International useful for effective communication.
1.0 N kg = 1.0 (kg m s ) kg , hence 1.0 N kg = 1.0 m s
–1






B01 QBank Physics F4.indd 4 10/02/2022 3:44 PM

C 10. Suppose the three base standards of the metric
Vectors: system were length, density, and time rather than
Force length, mass, and time. The standard of density
Velocity in this system is to be defined as that of water.
Acceleration What is the relationship of mass in terms of the
Electrical power new base standards? HOTS Analysing

A rL 3
D B LT 3
3
Base quantities: C r L
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Length D 3rLT
Area
Electric current 11. What are the major concerns if length, density
Density of liquid and time were taken as new base standards?
HOTS Analysing

I The results of measurements are not
9. Diagram 1 shows both the imperical and metric reproducible
scales enclaved on a ruler. II No standard procedure for measuring density

Which of the following grouping shows metric of a material
units only? HOTS Applying III Difficulties in preparation of the standard for
density of a selected material
A III only
B II and III
C I, II and III
Diagram 1
A
1.2 Scientific Investigation
gram
inch
mole 12. Diagram 2 shows a graph of relationship between
yard p and q. HOTS Applying

p
B
liter a
b
mile
(0, c)
foot
psi 0 q

Diagram 2
C
Which of the following is incorrect?
centimeter a
candela A The gradient is
b
calorie B p increases linearly with q
second a
C The equation is q = p + c
b
a
D D When q = 1 then p = + c
b
ampere
pascal
watt
ohm

5
Question 9:
SOS TIP Only the grouping of ampere, pascal, watt and ohm are metric units. SOS TIP
Question 10:
Use r = mL
–3
Question 12:
Use y = mx + c




B01 QBank Physics F4.indd 5 10/02/2022 3:44 PM

13. Which of the following graph shows P varies A The gradient of material R is greater than that
non-linearly with V? HOTS Applying of S
A B Both materials R and S have a linear
P relationship of V against I
C Material R possesses greater rate of direct
proportionality than S
D As V increases, the value of I must also
increase for both materials R and S
V 15. Diagram 4 shows a graph of p against q for two
0 ©PAN ASIA PUBLICATIONS
B different media, X and Y.
P p
Medium X


Medium Y

V
C q
P Diagram 4
E : q-intercept of medium X
X
E : q-intercept of medium Y
Y
r : graph gradient of medium X
X
r : graph gradient of medium Y
Y
V Which pair is correct? HOTS Analysing
D
p-intercept Graph gradient
P
A E , E r . r
X Y X Y
B E . E r , r
X Y X Y
C E , E r , r
X Y X Y
V D E . E r . r
X Y X Y
14. Diagram 3 shows a graph of relationships 16. Graph of y against x in Diagram 5 shows the
between two physical quantities, V and I for inverse proportionality relationship between
two different materials of R and S. Which of the
following statement is most appropriate? physical quantities of y and x. What is the value
HOTS Applying
HOTS Analysing of y when x = 10?
y
V
R 50
40
S 30 25
20
10
2.4
0 x
1 2 3 4 5
I
Diagram 5
Diagram 3 A 6 C 36
B 12 D 60
6
Question 13:
SOS TIP SOS TIP
Answer C shows a curve with positive gradient and passing through the origin. Answer D shows an inverse-proportionality relationship.








B01 QBank Physics F4.indd 6 10/02/2022 3:44 PM

PAPER 2


Section A
Answer all questions.
1. Diagram 1 shows a surgeon performing microsurgery. She needs a sharp, magnified view of the surgical
site. She’s wearing glasses with magnifying lenses.



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Diagram 1
(a) Name the type of lenses she’s wearing. [1 mark]



(b) What is the optical phenomena occurred in the lenses? [1 mark]



(c) Draw a ray diagram to show the formation of the image for the surgical site. [2 marks]











(d) The surgeon does not wish to strain her eyes while performing the microsurgery. Where should be the
exact position of the surgical site from her (i) magnifying lenses (ii) eyes? HOTS Analysing [2 marks]






2. Diagram 2.1 shows how a ray of light passes through a glass block.


Air


Glass






Diagram 2.1
(a) (i) Draw and label the normal, the refracted ray, the angle of incidence and the angle of refraction in
Diagram 2.1. [2 marks]
98 Question 1:
SOS TIP (d) A virtual image with a large angular size that is infinitely far away and the distance from magnifier to eye is not that crucial. SOS TIP










B06 QBank Physics F4.indd 98 10/02/2022 3:49 PM

(c) Why is an image formed by a parabolic mirror sharper than the image of the same object formed by a
concave spherical mirror? HOTS Analysing [3 marks]






Section B
Answer all questions.

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6. (a) In Diagram 6, a real inverted image I of an object O is formed by a particular lens (not shown); the
object–image separation is d = 60.0 cm, measured along the central axis of the lens. The image is just
half the size of the object.
O


Lens here Axis

I
d


Diagram 6
(i) What kind of lens must be used to produce this image?
(ii) How far from the object must the lens be placed?

(iii) What is the focal length of the lens?
(iv) What is the other position of lens that can be used to produce a magnified image? Explain your
answers clearly. HOTS Analysing [8 marks]
(b) A compound microscope contains an objective lens and an eyepiece lens. The focal length of the
objective lens is f and the focal length of the eyepiece lens is f .
o e
You are assigned to study the suitable ways to build a compound microscope with maximum
magnification. Table 1 shows various arrangement for the lenses.
Table 1
Aspect Distance between the
Object distance, Comparison Distance between image formed by the
u from the objective lens
o of f and f objective lens and the
objective lens o e and eyepiece, d
Arrangement eyepiece, u
i
W u , f f , f d . (f + f ) u , f
o o o e o e i e
X u . 2f f . f d = (f + f ) u . f
o o o e o e i e
Y f , u , 2 f f , f d . (f + f ) u , f
o o o o e o e i e
Z u = f f . f d = (f + f ) u = f
o o o e o e i e
(i) Choose the most suitable arrangement and provide reasons for your choice. HOTS Evaluating
[10 marks]
(ii) Apart of the aspects given in Table 1, suggest another one factor for better quality of compound
microscope. Give a reason. HOTS Creating [2 marks]
102 Question 5:
SOS TIP (c) All parallel rays converge at a parabolic mirror’s focal point. The focal point is sharp. SOS TIP
Question 6:
(b) The refractive indices of the objective lens and eyepiece may affect the design of the microscope. The range of wavelengths for the light source also can
affect the quality of image formed.






B06 QBank Physics F4.indd 102 10/02/2022 3:49 PM

Section C
Answer all questions.

8. When light rays encounter curved surfaces between two media, images can be formed by either reflection
or refraction due to these surfaces. We can design mirrors and lenses to form images with desired
characteristics.
(a) Explain how does a curved surface change the direction of light? HOTS Applying [2 marks]
(b) Diagram 8.1 shows the design of an oven made by a student for boiling soup using solar energy.

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Diagram 8.1
You are required to suggest new design of an oven so that the soup in the pot boils in a shorter time. In
your explanation, emphasize on the following aspects:
(i) Size of the oven
(ii) Shape of the oven
(iii) Position of the pot
(iv) The type of surface for the oven
(v) The variation of the orientation for the oven with time HOTS Creating [10 marks]
(c) In Diagram 8.2, an object is placed in front of a converging lens at a distance equal to twice the focal
length f of the lens. On the other side of the lens is a concave mirror of focal length f separated from
1 2
the lens by a distance 2(f + f ). Light from the object passes rightward through the lens, reflects from
1 2
the mirror, passes leftward through the lens, and forms a final image of the object.
f f
1 2
O



2f 2(f + f )
1 1 2
Diagram 8.2


What are
(i) the distance between the lens and that final image,
(ii) the overall lateral magnification M of the object and
(iii) the characteristics of the final image? HOTS Evaluating [8 marks]









104 Question 8:
SOS TIP (c) First, the convex lens form a real image of the object, I at a distance 2f to the right of the lens. This is 2(f + f ) – 2f = 2f in front of the concave mirror. SOS TIP
1
1
2
1
1
2
The subsequent image formed by the concave mirror, I is located at a distance 2f to the left of the mirror. This is 2(f + f ) – 2f = 2f to the right of the
2
2
1
2
1
2
convex lens. The final image, I is formed at a distance 2f to the left of the lens. [You may construct a ray diagram to verify these]
3
1
B06 QBank Physics F4.indd 104 10/02/2022 3:49 PM

Reinforcement and Assessment of Science Process Skills
for Paper 3 (Practical Test)



1. In this experiment, you will determine the focal length, f of a lens. Carry out the following instructions,
referring to Diagram 1.
D
X wire
screen Lens
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Lamp Screen





u v
i
Diagram 1
(a) Place the centre of the lens at a distance, u = 15.0 cm from the illuminated X wire.

Place the screen close to the lens and move it away from the lens until a sharply-focused image is
formed on the screen.
• Measure the distance, v from the centre of the lens to the screen. Record v in Table 1.
• Calculate uv and record the result in the table.
• Measure and record the distance D from the illuminated X wire to the screen in the table.

(b) Repeat the steps in (a) with the lens at a distance u = 20.0 cm, 25.0 cm, 30.0 cm and 35.0 cm from the
illuminated X wire. Record all the readings in the table. [6 marks]
Table 1

u / cm v / cm uv / cm 2 D / cm
15.0

20.0

25.0
30.0

35.0

(c) Based on the information and observation:
(i) identify the manipulated variable,

(ii) identify the responding variable. [2 marks]
(d) Plot a graph of uv (y-axis) against D (x-axis). Start your axes from the origin (0,0). Draw a best-fit

line. [3 marks]
(e) (i) Based on the graph drawn in (d), determine the value of the focal length of the lens. [2 marks]

(ii) State two precautions that you took in this experiment in order to obtain reliable readings.
[2 marks]


105
Question 1:
SOS TIP (e) Make sure the object, the optical centre of the lens and the centre of the screen were located on the principal axis of the lens. The eye position must be SOS TIP
(b) Make sure that the derived quantities of uv and D must have consistent number of decimal places.
vertically above the scale of the metre rule when taking readings to avoid parallax errors.







B06 QBank Physics F4.indd 105 10/02/2022 3:49 PM

If you are unable to carry out the experiment described, you can answer this question by using the data
obtained as shown in Table 2.
Table 2

u/cm v/cm u/cm v/cm


Screen Screen



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15.0 30.0





26 27 28 29 30 31 11 12 13 14 15 16




Screen Screen






20.0 35.0





16 17 18 19 20 21 10 11 12 13 14 15





Screen






25.0




13 14 15 16 17













106 • Experiment must be carried out in darkened room.
SOS TIP • Lens, screen and object must be on a same straight line. SOS TIP
• When the object is moving further away from the lens, the size and the position of the image both change and you need to move the screen nearer to get a
clear and sharp image again.







B06 QBank Physics F4.indd 106 10/02/2022 3:49 PM

Answers






CHAPTER 1 22. D When we divide the measured time by 20, the inaccuracy
1
associated with period T due to human reaction will be only 20
of the human reaction time i.e 0.015 to 0.025 s.
Paper 1
23. C The Earth is not a perfect sphere – it’s slightly flattened
1. A Physics is the study of matter and energy as well as phenomena at the poles and bulges out near the equator, so points near
happening around us. the equator are farther from the center of mass. The distance
between the centers of mass of two objects affects the
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2. D Candela (cd) is the base unit for luminous intensity. gravitational force between them, so the force of gravity on an
3. D Thermodynamic temperature is a base quantity. object is smaller at the equator compared to the poles.

4. B S.I. is a worldwide standardisation of measurement units that has 24. C All true except T is directly proportional to l. The correct
2
simplified the work in science, sports, commerce, medicine and relationship is T is directly proportional to l.
other fields.
25. C All true except m is directly proportional to T. The correct
2
5. C Both base and derived quantities may be scalars or vectors. relationship is T is directly proportional to m.
Vector has both magnitude and direction.
26. D A straight line drawn through the maximum number of
6. D 1 N kg = 1 m s , experimental points may not be the best fitted line.
–1
–2
hence 10 000 N kg = 10 000 m s .
–2
–1
7. A All three: velocity, momentum and impulsive force have both Paper 2
magnitude and direction. Section A
8. A All the four quantities do not have direction. 1. (a) Base quantity is physical quantity that cannot be derived from
other physical quantities.
9. D Ampere, pascal, watt and ohm are metric units. (b) (i)
10. A r = m L , Base quantity Derived quantity
–3
hence m = rL . 3
Time Power
11. C All true Temperature Chapter 1
a
12. C The correct equation is p = q + c. (ii)
b Metric system Imperial system
13. C Curve with positive gradient and passing through the origin. watt °F
Answer D shows an inverse-proportionality relationship.
14. A The R line has steeper slope than S. 2. (a) (i) Distance
(ii) Force, charge (any one)
15. A The X line has steeper slope than Y but at p = 0, line Y is above (iii) Force Fr 2
X. (b) Unit for k = Qq
–2
16. A Inverse proportionality: x y = x y , = kg m s × m 2
1 1 2 2 (A s × A s)
2.4 × 25 = 10 × y 2 = kg m s A –2
3
–4
y = 6
2 t + t
π 2
17. C Square both sides, r = ( ) s, if r is plotted against s, the 3. (a) (i) Average time, t = 2 2 1
2
2
ß
π 2
gradient is ( ) . = 22.22 + 22.13
ß
18. B A graph represents the average value of the readings of an = 22.18 s 2
experiment and provides a visual relationship between variables (ii) To reduce the inaccuracy due to human reaction time.
under investigation. (iii) • Set the simple pendulum swings with small amplitude
• Make sure the oscillations are on a vertical plane only.
19. B A line of best fit is a straight line drawn through the maximum 22.18
number of points and balancing about an equal number of points (b) (i) T = 20
above and below the line. = 1.109 s
g
20. A Making an inference means interpreting or explaining factors as (ii) l = ( 4π 2) T 2
a result of an observation for a phenomenon. The ultimate goal ( 981 2
of a problem statement is to transform a generalized problem = 4π 2 ) × (1.109)
into a targeted, well-defined problem; one that can be resolved = 30.56 cm
through scientific research. (iii) The time taken for 20 swings will be much longer
(roughly 2.5 times) because the value of g on the Moon
m
21. A Using y = sx + c, substitute x with V, y with U, s = , and c is surface is 6 times smaller than that on the Earth.
n
U-intercept = m and then rearrange to make V as a subject in the
equation.
107


Answer QBank Physics F4.indd 107 10/02/2022 4:03 PM

4. (a) m = r V, l = ! V (d) Graph of T against l
2
3
(b) • No measuring instrument can measure density and volume T / s 2
2
accurately.
• No suitable object for standard density and standard volume.
• Units for derived quantity become very complex. 2.8
• Hinder effective communication among physicists.
2.4
5. (a) Draw graph of V against x. Extrapolate it to find V when
0
x = 0. V is 46 L.
0
(b) Using interpolation method V is 41 L when x = 50 km, hence 2.0
the petrol consumption is
V – V = 46 – 41 1.6
0
= 5 L
40.0 ©PAN ASIA PUBLICATIONS
(c) 1.2
Distance, 40 60 80 100 120 140 160 180 200
x / km 0.8
Volume 0.4
of petrol, 42.60 40.05 37.93 35.80 33.25 31.55 30.28 27.30 25.60
V / L
0
10 20 30 40 50 60 70 80 I / cm
(d) Graph of remaining volume of petrol, V against distance, x 2.38 – 0
(e) Gradient, s =
60 – 0
= 0.0397 s cm –1
2
Remaining volume of petrol, V / L 4π 2
g =
s
Chapter 1 – Chapter 2
= 994 cm s –2
50
40
CHAPTER 2
30
20
Paper 1
10
1. D Distance is the total length travelled by the security personnel
x / km
0 = 5 + 7 + 5 + 10 + 10 + 10 + 10
20 40 60 80 100 120 140 160 180 200
= 57 m.
Displacement is the distance travelled in a specified direction PQ
= 7 + 10 +10
Paper 3 = 27 m.
1. (a) Measure l and l and then taking average. 2. A Not sufficient information to check whether the object moves
1 2
with constant velocity or not (the dots do not display consistent
Clamp equal spacing pattern).
3. A u = 0.2 cm
0.02 s
= 10 cm s –1
l + l
l l l l = 1 2 v = 1.4 cm
1 2
2 0.04 s
= 35 cm s –1
∆ t = 4.5 × 0.02
= 0.09 s (From 1 the mid-point to the end mid-point)
st
Acceleration = 35 – 10
0.09 s
Centre of bob = 278 cm s –2
(b)
4. D 10 ticks = 0.2 s
l / cm t / s T / s T / s 2 4 cm
2
u = 0.2 s
20.0 17.65 0.833 0.780 = 20 cm s –1
30.0 22.15 1.108 1.228 v = 24 cm
0.2 s
25.00 1.250 1.563 = 120 cm s
–1
50.0 27.95 1.398 1.954 ∆ t = (6 – 1) × 0.2 s
= 1 s
60.0 30.80 1.540 2.372 (120 – 20) cm s –1
Acceleration = 1 s
(c) (i) The manipulated variable: length of pendulum, l = 100 cm s –2
(ii) The responding variable: the period T of the pendulum

108




Answer QBank Physics F4.indd 108 10/02/2022 4:03 PM

5. C When an object is rotated at a certain uniform speed, though the 21. D Both R and S are heavy objects and they will travel with same
speed is uniform, the direction of motion of the object keeps variation of velocity with time.
changing. Hence, acceleration is acting on the object.
22. D This is a non-free fall motion because of the effect of air
6. B s = (u + v)t resistance and parachute action on the parachutist. Hence,
1
2 velocity, acceleration and momentum are not constant.
1.5 = (0 + 20)t
1
2
t = 0.15 s 23. D Objects of different masses fall with the same acceleration if air
resistance does not exist (vacuum cylinder). Hence, they will
2
7. B v = u + 2as reach the floor at the same time.
2
35 = 0 + 2(4)s,
2
s = 153.1 m 24. D Apples of different masses fall with the same acceleration under
free fall condition (vacuum means no air resistance). Answer C
Hence, minimum runway is 154 m long
2 ©PAN ASIA PUBLICATIONS
not correct because no measurement was made.
8. B v = 600 m
5 × 5 s 25. A Inertia is the tendency of an object to remain at rest or, if
= 24 m s moving, to continue its motion in a straight line at uniform
–1
(6 drops of oil = 5 time intervals only) velocity. The concept of inertia is explained in Newton’s First
Law of Motion.
Total displacement
9. A Average velocity = Total time taken 26. A The larger the mass of an object, the larger the inertia of the
= 10 object.
20
= 0.5 m s –1 27. A The loaded supertanker is massive and has huge amount of
inertia. Hence, it’s very difficult to change the states of motion.
10. D Displacement measures the shortest distance travelled between
the starting point and the ending point. 28. D Inertia is the resistance of an object to change its state of motion.
Inertia is non-physical quantity. Mass is a measure of inertia.
11. C The gradient at PQ is increasing with time, hence the object’s
acceleration is increasing. The gradient at ST is zero, hence it’s 29. C There may be external forces acting on the object but they are
moving with uniform velocity. well balanced. Due to F = ma, a = 0 (uniform velocity) when
∑F = 0.
12. B Area of trapezium = (20 + 8)v = 56
1
2 30. C Newton’s Third Law of Motion states that for every force there
v = 112 is an opposite and equivalent force against it.
28
= 4.0 m s –1
31. B Objects with larger momentum are more difficult to stop.
13. B The acceleration of cyclists is positive in the beginning then zero 32. D When two or more objects act on each other, their total Chapter 2
and finally negative. momentum remains constant, provided there are no external
forces acting on the system.
14. B A steady speed means that the speed of the toy car remains the
same during the motion. 33. C m v + m v = m u + m u
1 1
2 2
2 2
1 1
15. B The gradient of the graph from Q to S is increasing and then 10 v + 0.1 × (–0.05) = 0

decreasing. (You may draw tangents along the curve Q to S to 1 000 v = 0.5 m s –1
confirm this)
1
AB
16. B s = ut + gt 2 34. C If body A exerts a force F on body B, then body B will exert an
equal and opposite force F on body A.
2 BA
1
= 0 + (9.81)(2.12) 2 35. D All the statements regarding action and reaction forces are true.
2
= 22.05 m
36. C Momentum, p = mv, v can be increased by increasing p.
17. D No air on the surface of the Moon. Objects of different masses
fall with the same acceleration if air resistance does not exist. 37. A m v + m v = m u + m u
2 2
1 1
2 2
1 1
Hence, they will reach the floor at the same time. (1 000 × 5.0) + (800 × 2.0) = (1 000 × 3.4) + 800v
v = 4 m s –1
18. C Gravitational acceleration is constant near the surface of the
Earth. 38. C Most of the weight of the rocket is the weight of the propellants.
In order to lighten the weight of the vehicle to achieve higher
1
19. C s = ut + gt acceleration, most launchers discard a portion of the vehicle in
2
2
1
0 + (9.81)t = 125 m a process called staging.
2
2
t = 5.05 s 39. D Recall the definition of acceleration. It’s the rate change of
velocity.
20. A By using v = u – 2gs
2
At maximum height, v = 0 40. C Force will not change the inertia of an object
Hence, s = u 2 v – u
2g 41. C a = t
s = 25 2 30
2 × 9.81 = 5
s = 31.9 m = 6 m s –2
F = ma
= 1 200 × 6
= 7 200 N
109
Answer QBank Physics F4.indd 109 10/02/2022 4:03 PM

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