YEAR 10 PHYSICS TIME: 2hours

DEPARTMENT FOR CURRICULUM,

RESEARCH, INNOVATION AND LIFELONG LEARNING

Directorate for Learning and Assessment Programmes

Educational Assessment Unit

Track 2

Annual Examinations for Secondary Schools 2018

YEAR 10

PHYSICS

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

Motion

Electricity

W = mg

F=ma

s=

s = ut +

v = u + at

(u + v) t

2

2

2

v = u + 2as

Q = It

V = IR

E = QV

R ¡Ø ?/?

E =IVt

1

1

1

=

+

R TOTAL R1 R 2

speed of light in air

¦Ç=

speed of light in medium

Average Speed =

total distance

total time

R TOTAL = R1 + R 2 + R 3

real depth

apparent depth

v = f ¦Ë

1

f=

T

1

Area of triangle = bh

2

¦Ç=

Waves

Others

magnification =

hi image height

=

ho object height

1

Area of Trapezium = (a + b)h

2

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.

This document consists of 10 printed pages.

Physics ¨C Year 10 ¨C Track 2 ¨C 2018

1 2

at

2

Momentum = m v

For Examiner¡¯s Use Only

Question

Max

Mark

1

2

3

4

5

6

7

8

Written

Practical

8

8

8

8

8

15

15

15

85

15

Total

100

Page 1 of 10

SECTION A

Each question carries 8 marks.

This section carries 40 marks of the total marks for this paper.

microphone

1. A vibrating tuning fork is placed

close to a microphone as shown in

Figure 1.

tuning fork

oscilloscope

Figure 1

a) Are sound waves transverse or longitudinal?

_______________________________________________________________________ [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.

Page 2 of 10

[1]

Physics ¨C Year 10 ¨C Track 2 ¨C 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 ¨C Year 10 ¨C Track 2 ¨C 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

C

S4

B

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.

A

ammeter

constantan wire

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 ¨C Year 10 ¨C Track 2 ¨C 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]

lens

distant

object

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 ¨C Year 10 ¨C Track 2 ¨C 2018

Page 5 of 10

 ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download