This document contains a physics test with 30 multiple choice questions covering various concepts including pressure, forces, buoyancy, and fluids. It includes diagrams and information related to each question. The test is divided into two sections - Section A contains the questions and answer sheet, while Section B contains longer multi-part questions requiring calculations. Some example questions cover topics like the relationship between load and spring extension, impact speed of an object falling from a height, pressure exerted by fluids at different depths, and buoyant forces on objects submerged in water.

1. 1
SEKOLAH MENENGAH KEBANGSAAN TAMAN SEA
August Test 2013
PHYSICS
Form 4
(1 hour)
Name:…………………………………….. Class:……………
Answer all questions in Section A and Section B. Answer Section A in the space provided on Page 8.
Section A
1 The table shows the results of an experiment to
investigate the relationship between load and
extension of a spring. The diameter of the
spring, d, is 1.0 cm. The original length of
spring, l0, is 7.0 cm.
Load, F /N Extension, x / cm
0.5 0.4
1.0 0.9
1.5 1.1
2.0 1.6
2.5 2.0
Which physical quantity is the responding
variable ?
A Load, F
B Extension, x
C Original length of spring, l0
D Diameter of spring, d
2 An object is released from rest at an
altitude of 1.0 x 107
m. What is its impact
speed with the earth? Assume no air
resistance and g is constant.
A 7.0 x 103
m s-1
B 8.7 x103
m s-1
C 1.1 x104
m s-1
D 1.4 x104
m s-1
3 The diagram shows a pillion rider moving
backwards when the motorcycle accelerates
suddenly.
The backward movement of the pillion rider
can be explained by
A the concept of inertia
B the concept of impulsive force
C the concept of equilibrium of forces
D the principle of conservation of energy
4 A worker is lifting boxes of identical weights
from the ground to a conveyor belt. At first, it
takes him 2.0 s to lift each box. Later in the
day, it takes him 2.4s . Which of the following
statements is correct ?
A Later in the day, less work is done in lifting
each box.
B Later in the day, more work is done in
lifting each box.
C Later in the day, less power is developed in
lifting each box.
D Later in the day, more power is developed in
lifting each box.
5 A gymnast bounces off a trampoline with a
velocity of 16 m s-1
. What is the maximum
height he can reach?
A 0.8 m
B 4.0 m
C 8.4 m
D 12.8 m
g = 10 N kg-1
Momentum = mv Pressure, p = hρg v2
= u2
+ 2as
a =
t
uv −
s = ut +
2
1
at2
Pressure, p =
A
F
Kinetic energy =
2
1
mv2
Gravitational potential energy = mgh Elastic potential energy =
2
1
Fx

2. 2
6 Two forces, 3 N and 4 N, act on point P as
shown in the diagram.
Which of the following vector diagrams show
the resultant force, F, for the two forces?
B
7 The diagram shows a wooden block being pulled
by a force of 10 N at an angle of 40o
to the floor.
If the wooden block is pulled through a distance
of 5 m, how much work is done on the wooden
block ?
A 18.8 J
B 24.4 J
C 38.3 J
D 50.0 J
8 A crane lifts a load of 200 kg to a height of 80m
in 12 s. If the power input is 30 kW, what is the
efficiency of the crane ?
A 21 %
B 44%
C 53%
D 64%
9 Assuming all the springs are identical, which
arrangement will produce the smallest extension
when a similar load is hung on to it ?
10 The figure shows 3 similar springs, A, B and C.
Each spring extends by 2.0 cm if a load of 40N
is hung on it.
What is the extension of the spring system
when the load on it is 120 N ?
A 6.0 cm
B 9.0 cm
C 12.0 cm
D 16.0 cm
11 The graph shows a graph of force against
extension for a spring.
What is the elastic potential energy stored in the
spring when it is extended by 0.08 m?
A 0.04 J
B 0.08 J
C 0.16 J
120 N
0.02 0.04 0.06 0.08 1.0 x / m
F / N

3. 3
D 0.20 J
12 All of the following will increase the stiffness of
a spring made of copper wire except
A increasing the diameter of the spring coil
B increasing the diameter of the wire
C decreasing the length of the spring
D replacing the copper wire with a steel wire
of the same diameter
13 A brick with rectangular sides rest on a table as
shown in the diagram. The brick is then turned
so that it rests on the table on its smallest face.
How has this change affected the force and the
pressure exerted by the brick on the table ?
Force Pressure
A unchanged unchanged
B unchanged increased
C increased unchanged
D increased increased
14 Which shoe would exert the highest pressure on
the ground when worn by the same lady?
A B
C D
15 A girl has a mass of 50 kg. She wears a pair of
shoes that cover 420 cm2
of the floor area.What
is the average pressure she exerts on the floor?
A 1.2 x 10
4
Pa
B 1.2 x 10
5
Pa
C 2.1 x 10
4
Pa
D 2.1 x 10
5
Pa
16 A farmer has two carts. The carts have the same
weight, but one has four narrow wheels and the
other has four wide wheels. The diagram shows
the two type of wheels.
In rainy weather, which cart sinks into soft
ground, and why ?
Wheels Reason
A Wide Less pressure on the ground
B Wide Greater pressure on the ground
C Narrow Less pressure on the ground
D Narrow Greater pressure on the ground
17 The diagram shows a fish in the sea. What is
the pressure exerted by the water on the fish ?
[Water density = 1 000 kg m
-3
]
A 5 x 10 Pa
B 5 x 10
2
Pa
C 5 x 10
3
Pa
D 5 x 10
4
Pa
18 The figure shows three containers with different
shapes filled with water to the same level. The
pressure caused by the water at points P, Q and
R are P1 , P2 and P3 respectively.
Which comparison is correct?
A P1 > P2 > P3
B P1 < P2 < P3
C P1=P2 = P3
5 m
Diagram 14

4. 4
19 The diagram shows the design of a dam. Why
does the thickness of the dam have to be
increased downwards?
A So that the dam can support its own weight.
B The water pressure increases with depth.
C The density of the water increases with
depth.
D The temperature of the water increase with
depth.
20 The diagram shows a simple mercury barometer
used to measure atmospheric pressure. Two
students carry the mercury barometer from the
1st
floor to the 30th
floor of a block of flats
They noticed that the height of the mercury
column, h, in the barometer decreases.
Why is this so ?
A Air pressure has decreased.
B There is more air around them.
C Some mercury has evaporated.
D They are climbing too quickly.
21 A capillary tube filled with a drop of mercury is
held in four different positions. In which
capillary tube, A, B, C or D will the pressure of
the gas inside be the highest?
A B
D
C
22 The diagram shows a manometer connected to a
gas tank.
(Density of water = 1000 kg m
-3
.
Atmospheric pressure = 100,000 Pa)
What is the pressure of the gas in the tank?
A 70 000 Pa
B 93 000 Pa
C 103 000 Pa
D 130 000 Pa
23 A water manometer is connected to a gas
supply. The diagram shows the water levels.
If the water is replaced by mercury, which of the
following shows the mercury levels when the
manometer is connected to the same gas supply?
[Density of water = 1 x 103
kg m-3
, density of
mercury = 1.36 x 104
kg m-3
)
30 cm
mercury
gas
mercury
gas
mercurygas
mercury gas

5. 5
24 Which of the following is not an application of
atmospheric pressure?
A siphon
B suction cup
C vacuum cleaner
D hydraulic brakes
25 The diagram shows a hydraulic brake system.
A driver steps on the brake pedal.
Which relationship is correct?
A Force on piston Q < Force on piston P
B Force on piston Q = Force on piston P
C Pressure on piston Q > Pressure on piston P
D Pressure on piston Q = Pressure on piston P
26 The diagrams show a test tube partially filled
with sand, first floating in water, and then
floating in tetrachloromethane. F1 and F2 are
the buoyant forces acting on the test-tubes in
water and tetrachloromethane respectively.
Which of the following statements about F1 and
F2 is true ?
A F1 < F2
B F1 = F2
C F1 > F2
27 A ship moves from the river to the sea. Which
of the following about the buoyant force acting
on the boat and the volume of water displaced
by the boat is true?
Buoyant force
acting on boat
Volume of water
displaced by boat
A increases increases
B increases decreases
C no change increases
D no change decreases
28 The diagram shows a block of metal hanging on
spirng balance in the air and the same block of
metal partially immersed in water.
The reading of the spring balance with the
stone in the air and partially immersed in the
water is 5 N and 3 N respectively. Which of the
following statements is true?
A The weight of the water displaced is 3 N.
B The buoyant force acting on the metal block
is 2 N.
C The weight of the metal block and the
weight of the water displaced is the same.
D The volume of the metal block and the
volume of water displaced is the same.
29 The diagram shows a boy on a float.
Which of the relationship between the physical
quantities in the above situation is correct?
A Volume of water displaced = (volume of
the boy + volume of the float)
B Volume of water displaced > ( volume of
the boy + volume of the float)
C Weight of water displaced = (weight of the
boy + weight of the float)
D Weight of water displaced > (weight of the
boy + weight of the float)
.

6. 6
30 Which of the following does not make use of
Archimedes’ Principle ?
A A ship
B A racing car
C A submarine
D A hot air ballon
Section B
1. The diagram below shows a hydraulic jack in a
car service center. A force F is exerted on the
small piston.
(a) Name the principle involved in a hydraulic jack.
(1m)
(b) The cross-sectional areas of the small piston and
the large piston are 0.05 m
2
and 1.00 m
2
respectively. A force of 50 N is exerted on the
small piston.
(i) Calculate the pressure exerted on the oil in
the hydraulic jack.
(2m)
(ii) Calculate the force exerted on the large
piston by the oil.
(1m)
(c) State one modification to the large piston to
enable the jack to lift a heavier load.
(1m)
(d) If air bubbles are found to be inside the oil, the
load that hydraulic jack is able to lift is much
less than that calculated in (c)(ii). Why is this
so?
(1m)
2. The diagram below shows a boy and his father
sitting on two identical beach balls, A and B
respectively. Their weights are balanced by the
buoyant force.
(a) What is the meaning of weight ?
(1m)
(b) Observe Diagrams 1 and 2.
(i) Compare the weight of the boy and his father.
(1m)
(ii) Compare the volume of water displaced in
these two situations.
(1m)
(iii) Compare the buoyant force in these two
situations.
(1m)
(c) State the relationship between the buoyant force
and
(i) the volume of water displaced
(1m)
(ii) the weight of water displaced
(1m)

7. 7
(d) Name the physics principle involved.
(1m)
3. A submarine descends to a depth of 70 m below the
surface ot the sea. The density of sea water is
1050 kg m-3
.
(Atmospheric pressure is 1.0 x 105
Pa.)
(a) Calculate
(i) the increase in pressure as it descends from
surface to a depth of 70 m
(2m)
(ii) the total pressure on the submarine at a depth
of 70 m
(1m)
(b) On another dive, the submarine experiences a
total pressure of 6.5 x 10
5
Pa. A hatch window
on the submarine has an area of 2.5 m2
. Calculate
the force on the outside of the hatch cover.
(c) The submarine undergoes tests in fresh water.
(i) Complete the following by ticking the correct
box:
At the same depth, the pressure on the
submarine in fresh water is
smaller than the pressure in sea water
greater than the pressure is sea water
same as the pressure in sea water
(1m)
(ii) Explain your answer to 3(c)(i).
(1m)
Answer Sheet for Section A
1 =A= =B= =C= =D=
2 =A= =B= =C= =D=
3 =A= =B= =C= =D=
4 =A= =B= =C= =D=
5 =A= =B= =C= =D=
6 =A= =B= =C= =D
7 =A= =B= =C= =D=
8 =A= =B= =C= =D=
9 =A= =B= =C= =D=
10 =A= =B= =C= =D=
11 =A= =B= =C= =D=
12 =A= =B= =C= =D=
13 =A= =B= =C= =D=
14 =A= =B= =C= =D=
15 =A= =B= =C= =D=
16 =A= =B= =C= =D=
17 =A= =B= =C= =D=
18 =A= =B= =C= =D=
19 =A= =B= =C= =D=
20 =A= =B= =C= =D=
21 =A= =B= =C= =D=
22 =A= =B= =C= =D=
23 =A= =B= =C= =D=
24 =A= =B= =C= =D=
25 =A= =B= =C= =D=
26 =A= =B= =C= =D=
27 =A= =B= =C= =D=
28 =A= =B= =C= =D=
29 =A= =B= =C= =D=
Prepared by :…………………………………
Ms Wong Yin Lee
Approved by:…………………………………
(Pn. Zakiah Mohd Nor)

8. 8
30 =A= =B= =C= =D=