YEAR 10 PHYSICS TIME: 2hours
DEPARTMENT FOR CURRICULUM, RESEARCH, INNOVATION AND LIFELONG LEARNING Directorate for Learning and Assessment Programmes Educational Assessment Unit
Annual Examinations for Secondary Schools 2018
YEAR 10
PHYSICS
Track 2
TIME: 2hours
Name: _____________________________________
Class: _______________
INFORMATION FOR CANDIDATES ? Where necessary take acceleration due to gravity `g' to be 10 m/s2. ? The use of a calculator is allowed. ? The number of marks for each question is given in brackets at the end of each
question.
? You may find these equations useful.
Force
F=ma
W = mg
Motion
Average
Speed
=
total distance total time
v = u + at
(u + v) t s= 2 v2 = u2 + 2as
s
=
ut
+
1 2
at2
Momentum = m v
Q = It
V = IR
E = QV
Electricity Waves Others
R /
RTOTAL = R1 + R2 + R3
real depth = apparent depth v = f
1 f=T
1 Area of triangle = 2 bh
E =IVt
1
11
RTOTAL = R1 + R2
speed of light in air = speed of light in medium
magnification
=
hi ho
=
image object
height height
1 Area of Trapezium = 2 (a + b)h
INSTRUCTIONS TO CANDIDATES ? Use blue or black ink. Pencil should be used
for diagrams only. ? Read each question carefully and make sure
that you know what you have to do before starting your answer. ? Answer ALL questions.
? All working must be shown.
For Examiner's Use Only Question Max Mark
1
8
2
8
3
8
4
8
5
8
6
15
7
15
8
15
Written 85
Practical 15
This document consists of 10 printed pages.
Total
100
Physics ? Year 10 ? Track 2 ? 2018
Page 1 of 10
SECTION A Each question carries 8 marks. This section carries 40 marks of the total marks for this paper.
1. A vibrating tuning fork is placed close to a microphone as shown in Figure 1.
microphone tuning fork
oscilloscope
a) Are sound waves transverse or longitudinal?
Figure 1
_______________________________________________________________________ [1]
b) Explain, in terms of movement of air particles, how sound reaches the microphone. _______________________________________________________________________ [1]
c) The speed of sound in air is 340 m/s. Given that the wavelength of the waves is 170 cm, calculate the frequency of the sound produced. __________________________________________________________________________ _______________________________________________________________________ [2]
d) Calculate the periodic time of the sound waves. _______________________________________________________________________ [1]
e) Explain why the sound produced can be heard by humans. __________________________________________________________________________ _______________________________________________________________________ [1]
f) The waveform produced by the vibrating tuning fork is shown in Figure 2.
Figure 2
Figure 3
Figure 4
i) On Figure 3, draw the waveform produced by the same tuning fork vibrating
with half the amplitude of the tuning fork in Figure 2.
[1]
ii) On Figure 4, draw the waveform produced by a different tuning fork vibrating
at half the frequency but with the same amplitude as in Figure 2.
[1]
Page 2 of 10
Physics ? Year 10 ? Track 2 ? 2018
2. Shania builds a model of a balloon propelled cart as shown in Figure 5. She attaches a balloon to the cart and inflates it. The cart and the balloon are initially at rest. The balloon is released and the cart moves rapidly to the right with a speed of 1.4 m/s. The total mass of the cart and the balloon is 200 g.
balloon
air rushing out
movement cart
Figure 5
a) What is the total momentum before the balloon is released? __________________________________________________________________________ [2]
b) What is the total momentum after the balloon is released? Explain. _____________________________________________________________________________ __________________________________________________________________________ [2]
c) Calculate the momentum of the cart as it travels at 1.4 m/s. _____________________________________________________________________________ __________________________________________________________________________ [1]
d) Given that the air flows out of the balloon with a speed of 24 m/s, calculate the initial mass of air present inside the balloon. _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ __________________________________________________________________________ [2]
e) Newton's 3rd law can be used to explain how this model works. State this law. _____________________________________________________________________________ __________________________________________________________________________ [1]
Physics ? Year 10 ? Track 2 ? 2018
Page 3 of 10
3. The circuit in Figure 6 consists of a cell, three identical filament lamps A, B and C and four switches S1, S2, S3 and S4.
S1 A
S2 B
S4
C
S3 Figure 6
a) State which switches need to be closed so that: i) only A and C light up;
____________________________________________________________________ [1] ii) only A and B light up;
____________________________________________________________________ [1] iii) all the three filament lamps light up.
____________________________________________________________________ [1]
b) Kelly connects a constantan wire XY in the circuit shown in Figure 7. When she closes the switch, she notices that current flows through the circuit.
constantan wire
A ammeter
X
Y
Figure 7
State what will be observed on the ammeter if: i) she replaces wire XY with a solid plastic cable;
____________________________________________________________________ [1] ii) she replaces wire XY with the same type of wire having double the length;
____________________________________________________________________ [1] iii) she connects an identical constantan wire in parallel with wire XY.
____________________________________________________________________ [1] c) Kelly tests whether the constantan wire in Figure 7 is an ohmic conductor. Name
TWO other components she requires to carry out this experiment.
_______________________________________________________________________ [2]
Page 4 of 10
Physics ? Year 10 ? Track 2 ? 2018
4. A parallel beam of light is incident on two different lenses as shown in Figure 8.
A
B
Figure 8
a) Fill in: Lens A is called a _____________________ lens, while lens B is called a
_____________________ lens.
[2]
b) Draw the path taken by the beam of light as it travels through each lens. [2]
c) One of the lenses in Figure 8 is used to find its approximate focal length using a distant object as shown in Figure 9. Which of the two lenses can be used for this experiment? _______________________________________________________________________ [1]
distant object
lens
image
Figure 9
d) Explain briefly how this experiment is carried out. State clearly which distance is approximately equal to the focal length of the lens. __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ _______________________________________________________________________ [2]
e) The image in Figure 9 is inverted. State ONE other property of the image formed. _______________________________________________________________________ [1]
Physics ? Year 10 ? Track 2 ? 2018
Page 5 of 10
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