Physics – Year 9 – Track 2 – 2017 Page 1 of 11

DIRECTORATE FOR QUALITY AND STANDARDS IN EDUCATION

Department of Curriculum Management

Educational Assessment Unit

Annual Examinations 2017

YEAR 9 PHYSICS TIME: 2 hours

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.

Density m = ρ V

Pressure P = ρ g h F = P A

Forces W = m g

Moments Moment = F × perpendicular distance

Energy P. E. = m g h K. E. =

1

2mv2 Work Done = F s

Work Done = Energy Converted E = P t

Heat ΔQ = m c Δθ

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 writing 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

Total 100

This document consists of 11 printed pages.

Track 2

Page 2 of 11 Physics – Year 9 – Track 2 – 2017

SECTION A

Each question carries 8 marks. This section carries 40 marks of the total marks for this paper.

1.

a) Explain the term ‘non-renewable source of energy’.

___________________________________________________________________________[1]

b) State which of the following source of energy are renewable and which are non-renewable.

Source of Energy Renewable or Non-Renewable

Wind

Oil

Nuclear

[3]

c) Give ONE advantage and ONE disadvantage of:

i) Solar energy

Advantage:___________________________________________________________ [1]

Disadvantage:_________________________________________________________ [1]

ii) Coal:

Advantage:___________________________________________________________ [1]

Disadvantage:_________________________________________________________ [1]

2. Martina of weight 450 N, stands on her

tiptoes as shown in Figure 1. This is a type

of lever. The ball of the foot is the pivot,

the force in the muscle is the effort 𝐸

needed to overcome Martina’s weight.

a) If Martina is in equilibrium calculate

the effort 𝐸 in Martina’s muscle.

__________________________________

__________________________________

_____________________________________________________________________________

_____________________________________________________________________________

___________________________________________________________________________[2]

Figure 1

Physics – Year 9 – Track 2 – 2017 Page 3 of 11

b) If Martina had more weight, would she need to make a larger or a smaller effort? Explain.

_____________________________________________________________________________

___________________________________________________________________________[2]

c) A lever can be used to move a large load by exerting a smaller force. Figure 2 below shows

such a uniform lever of weight 10 N being used to move a load of 500 N.

Figure 2

i) The total length of the lever is ___________________ m. [1]

ii) The distance 𝑥 is _____________________________ m. [1]

iii) Calculate the size of the smallest value of 𝐹 needed to move the load.

__________________________________________________________________________

__________________________________________________________________________

________________________________________________________________________[2]

3. Figure 3 shows two liquids A and B, and a solid C.

a) Using the diagram, record and write down the volume

of the two liquids A and B, in Figure 3.

Table 1

[2]

b) Name the apparatus needed to find the mass of an object.__________________________ [1]

Mass (g) Volume (cm3) Density (g/cm3)

Liquid A 1.00

Liquid B 238.70 0.92

Solid C 2504.00 218.00

𝑥

1.0 m 0.5 m

10 N

500 N

𝐹

C

A B

Figure 3

Page 4 of 11 Physics – Year 9 – Track 2 – 2017

c) Mention ONE precaution that one must take when reading the volume of a

liquid from a thin measuring cylinder.

_______________________________________________________________

_____________________________________________________________[1]

d) Fill in the other missing parts of the table. Use the space below for your

working.

_______________________________________________________________

_____________________________________________________________[2]

e) The two liquids are poured in one cylinder. On the diagram of Figure 4, draw

and label liquid A and liquid B in their final settling positions. [1]

f) Solid C is dropped in the container with the two liquids. Mark the position that the solid will

settle in with a ‘C’. [1]

4. Table 2 contains information about some of the celestial bodies which orbit the Sun.

Table 2

Celestial Object

orbiting the Sun

Distance from the

Sun (× 𝟏𝟎𝟔 𝐤𝐦)

Time to spin once

on its axis (hours)

Time to complete orbit

around the Sun (years)

Mercury 58 1416.0 0.24

Venus 108 5832.0 0.60

Earth 150 24.0 1.00

Mars 228 24.5 1.90

Jupiter 779 10.0 11.90

Pluto 5906 153.3 248.00

a) Which of the celestial bodies in Table 2 has the shortest day and night?

___________________________________________________________________________[1]

b) Why do you think Mercury takes the shortest time to complete an orbit round the sun?

_____________________________________________________________________________

___________________________________________________________________________[1]

c) Which one of the celestial bodies in the table is NOT considered a planet? Explain.

_____________________________________________________________________________

___________________________________________________________________________ [2]

Figure 4

Physics – Year 9 – Track 2 – 2017 Page 5 of 11

d) Name the other THREE planets which are not in the table.

___________________________________________________________________________[3]

e) Explain the meaning of the term ‘light year’.

___________________________________________________________________________[1]

5. A luggage of mass 18 kg is being loaded by a conveyor belt as shown in Figure 5.

Figure 5

a) Calculate the gravitational potential energy of the luggage if it is raised through a height of

3 m.

___________________________________________________________________________[2]

b) Calculate the power needed to raise the luggage to a height of 3 m in 12 s.

_____________________________________________________________________________

___________________________________________________________________________[2]

c) The actual electrical power supplied is more than the answer obtained in part (b). Explain why

this is so.

_____________________________________________________________________________

_____________________________________________________________________________

___________________________________________________________________________[1]

d) The conveyor belt is removed. The luggage is accidentally dropped from Point B. Calculate

the velocity with which the luggage will hit the ground.

_____________________________________________________________________________

___________________________________________________________________________[3]

3 m

luggage

conveyor belt

B

A

Page 6 of 11 Physics – Year 9 – Track 2 – 2017

SECTION B

Each question carries 15 marks. This section carries 45 marks of the total marks for this paper.

6. Isaac and Rachela perform an experiment using a helical spring to verify Hooke’s Law.

a) i) Underline the correct word: Hooke’s law states that the (extension, original length)

of a stretched spring is (directly proportional, inversely proportional) to the load

provided that the elastic limit is not exceeded. [2]

ii) Figure 6 shows the apparatus they need to do this experiment. Use the words in the

grid below to label the diagram.

spring weights ruler pointer stand and clamp

[5]

Figure 6

b) Table 3 shows the readings obtained during the experiment.

Table 3

Load/N 0 1 2 3 4 5 6

Extension/mm 0 5 10 15 20 25 30

i) Plot a graph of Extension in mm on the y-axis against Load in N on the x-axis. [5]

ii) Underline the correct word.

Hooke’s law is obeyed since the shape of the graph is a (curve, straight line) through

the origin. [1]

If the spring is loaded with a (very large, very small) load, Hooke’s law will no longer

be obeyed and the spring will have a (permanent, proportional) extension. [2]

Physics – Year 9 – Track 2 – 2017 Page 7 of 11

Page 8 of 11 Physics – Year 9 – Track 2 – 2017

7. Clive decides to go swimming to a beach close to his home.

a) Calculate Clive’s weight if his mass is 72 kg.

_____________________________________________________________________________

_____________________________________________________________________________

___________________________________________________________________________[2]

b) Clive has two different types of sports shoes, as shown in

Table 4. Underline the correct word.

Table 4

A B

i) Underline the correct word.

Shoe B has the (largest, smallest) contact area with the floor. [1]

If Clive wears shoe B, he will make a (large, small) pressure on the sand and so the

shoe (will, will not) sink in the sand. [2]

ii) The contact area of ONE foot is 180 cm2. Find the pressure exerted by Clive in N/cm2

when he stands on ONE foot.

__________________________________________________________________________

________________________________________________________________________ [2]

iii) Calculate the contact area when he stands on TWO feet.

________________________________________________________________________ [1]

iv) Find the pressure exerted by Clive on the sand in N/cm2, when he stands on TWO feet.

__________________________________________________________________________

________________________________________________________________________ [2]

c) Clive arrives at the beach and dives into the sea which has a density of 1150 kg/m3 .

i) Calculate the pressure due to the sea water only at a depth of 3 m.

__________________________________________________________________________

________________________________________________________________________ [2]

Physics – Year 9 – Track 2 – 2017 Page 9 of 11

ii) Use your answer in part (c)(i) to calculate the TOTAL pressure at 3 m if the atmospheric

pressure is 101 000 Pa. Give your answer in kPa.

__________________________________________________________________________

________________________________________________________________________ [3]

8. James and Sarah swim in a swimming pool. The water in the pool has a volume of 300 m3.

a)

i) The density of water is 1000 kg/m3. Calculate the mass of the water in the pool using the

formula 𝑚 = 𝜌𝑉.

__________________________________________________________________________

________________________________________________________________________ [2]

ii) They would like to heat the water from a temperature of 14°C to 24°C. Calculate the

change in temperature.

________________________________________________________________________ [1]

iii) The specific heat capacity of water is 4200 J/ kg °C. Calculate the amount of heat energy

needed to raise the temperature of the water from 14°C to 24°C.

__________________________________________________________________________

__________________________________________________________________________

________________________________________________________________________ [2]

b) James accidentally drops his swimming robe in the pool. He claims that a wet fleece robe or

a dry fleece robe will not make any difference in insulation. Sarah suggests that they do an

experiment to see whether this statement is correct. They use the following apparatus to test

James’ idea:

two identical jars;

kettle with water;

pieces of wet and dry fleece;

stirrer;

stopwatch.

Page 10 of 11 Physics – Year 9 – Track 2 – 2017

Figure 7

i) The apparatus they need to measure temperature is called a _____________________ [2]

ii) Write numbers from 2 to 4 to indicate how the experiment is carried out.

The temperature is recorded every five minutes.

1 Two identical jars are covered with fleece.

The same amount of hot water is poured in each jar.

Some water is poured over the fleece of one of the jars so that the fleece will be wet.

[3]

iii) James plotted graphs of temperature against time for both wet and dry fleece.

Figure 8

Physics – Year 9 – Track 2 – 2017 Page 11 of 11

Underline the correct word.

The jar with dry fleece took (longer, less time) to cool down. [1]

This shows that (dry, wet) fleece is a better insulator than (dry fleece, wet fleece).

[2]

iv) Mention TWO precautions that Sarah and James should take when doing this experiment.

__________________________________________________________________________

__________________________________________________________________________

__________________________________________________________________________

__________________________________________________________________________

________________________________________________________________________ [2]

END OF PAPER