PHY F1 ANNUAL
Ku-Download mtihani huu [ BOFYA HAPA ]
THE
UNITED REPUBLIC OF TANZANIA
PRESEDENT’S
OFFICE
REGIONAL
ADMINISTRATION AND LOCAL GO VERNMENT
PHYSICS EXAMINATION
FORM
ONE
Time: 2 Hours 2020
INSTRUCTIONS:
1.
This
paper consists of sections A, B, and C.
2.
Answer
ALL questions in all sections.
3.
If
necessary use the following constants:
•
Force
of gravity; g = 10 N/kg
•
Acceleration
due to gravity, g = 10m/s2 Density of water = 1000 kg/m3 = 1 g/cm3.
SECTION
A (20 marks)
Answer
ALL questions from this section
1.
For
each of the following items, choose the correct answer among the given
alternatives and write its letter beside the item number.
(i)
A
quantity which can cause change in the speed or direction of a moving body
is
A.
Mass
B.
Density
C.
Weight
D.
Force
(ii)
A
support force exerted upon a body which is in contact with another stable body
is called
A.
Torsion
force
B.
Gravitation
force
C.
Frictional
force
D.
Normal
force
(iii)
A
material which does not recover its shape when a force is removed from it is
known as
A. Plastic material
B.
Elastic
material
C.
Elastic
limit
D.
Deformation
(iv)
The
ability of a liquid surface to act as a stretched elastic skin is called
A.
Stretching
force
B.
Capillarity
C.
Surface
tension
D.
Elastic
body
(v)
The
weight of 200g mass is
A.
0.2
N
B.
0.02
N
C.
2.0
N
D.
0.002
N
(vi)
The
force of attraction between the molecules of the same substance is called
A.
Cohesive
force
B.
Adhesive
force
C.
Gravitational
force
D.
Strong
force
(vii)
An
object weighs 60N in air and 40N in water, then its relative density is
A.
0.3
B.
3.0
C.
0.3
N
D.
3.0
N
(viii)
Which
of the following quantities is the same for a body on Earth and on the Moon?
A.
Density
B.
Weight
C.
Mass
D.
None
(ix)
Which
of the following expression represents the volume of a cylinder?
(x)
An
organized way of testing hypothesis is
A.
Measurement
B.
Experiment
C.
Observation
D.
Theory
(xi)
The
figure below shows a metre rule being used to measure the length of a wood.
The
length of the wood is approximately
A.
1.8
cm
B.
2.8
cm
C.
34.8
cm
D.
1.8
mm
(xii)
A
boat has a mass of 1000 tonnes and it is floating in a sea water. Therefore,
the amount of water displaced is
A.
10000
tonnes
B.
1000
N
C.
1000
kg
D.
1000
tonnes
(xiii)
Which
of the following is not a derived unit?
A.
Kilogram
B.
Newton
C.
Pascal
D.
Newton
per kilogram
(xiv)
One
of the following is not an example of a force
A.
Torsional
B.
Repulsive
C.
Newton
D.
Gravity
(xv)
Archimedes
principle deals with
A.
Floating
body
B.
Motion
of a body
C.
Apparent
weight of a body
D.
Real
weight of a body
(xvi)
Which
is true about Pascal’s principle? A. Pressure is equally transmitted in a liquid
B.
Pressure
is the force per unit area
C.
Pressure
in liquid depends on the depth
D.
Pascal
is the unit of pressure
(xvii)
Which
phenomenon is taking place when kerosene rises up a wick?
A.
Capillarity
B.
Osmosis
C.
Cohesion
D.
Evaporation
(xviii)
Which
of the following is observed when a tea bag is dipped into a cup of hot water?
A.
Osmosis
B.
Diffusion
C.
Cohesion
D.
Adhesion
(xix)
A
pressure exerted by a body increases as
A.
Its
area increases
B.
Its
density decreases
C.
Its
area decreases
D.
Its
unit is N/m2
(xx)
Which
of the following statements is false?
A.
Mercury
particles have high cohesive force
B.
Soap
and other detergents reduce a surface tension of water
C.
The
adhesion of water molecules make it wet
glass
D.
Any
body floating in water its density is higher than a density of water.
ANSWERS:
|
i |
ii |
iii |
iv
|
v |
vi |
vii |
viii |
ix |
x |
xi |
xii |
xiii |
xiv |
xv |
xvi |
xvii |
xviii |
xix |
xx |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
SECTION
B (40 Marks)
2.
Match
the items in list A with correct responses in list B by writing the letters of
the correct responses besides the item number.
|
LIST A |
LIST B |
|
(i)
It
is always slows things down (ii)
Force
of gravity (iii)
Molecules
move from a low to a high concentration (iv)
Force
of attraction between molecules of different substances (v)
Change
the shape and size of a body (vi)
Apparent
loss in weight (vii)
Produced
on solid object when it is twisted (viii)
Factors
on which the pressure exerted by a liquid depends |
A.
Force
B.
Upthrust
C.
Cohesion
D. Osmosis E.
Fundamental
force F.
Friction
force G. Depth and density H. Adhesion I.
Torsion
force J.
diffusion
|
|
LIST A |
i |
ii |
iii |
iv |
v |
vi
|
vii |
viii |
|
LIST
B |
|
|
|
|
|
|
|
|
3.
Fill
in the blanks with appropriate words.
(i)
The
four fundamental forces are ___________________________, _____________________,
_________________________________________ and
_______________________________.
(ii)
Laboratory
is a working room for ______________________________ where they carry out their
_________________________________.
(iii)
When
a body is totally or partially immersed in a fluid it experiences an
________________________________ which is equal to the
__________________________ of
the
fluid displaced. (08 marks)
4.
Mai
uses her apparatus to measure the density of water. The sentences below
describe her experiment for measuring the density of the water, but they are
not in the correct order. Use the
letters to write the correct order in the boxes provided. (08 marks)
A
Pour
50 cm3 water into the measuring cylinder.
B
Divide
the mass of the water by 50.
C
Remove
the empty measuring cylinder from the scales.
D
Place
the empty measuring cylinder on the scales.
E
Subtract
the mass of the measuring cylinder from mass of the measuring cylinder and
water.
F
Note
the mass of the empty measuring cylinder.
G
Note
the mass of the measuring cylinder and the water.
H
Place
the measuring cylinder and water on the scales.
5.
(a)
What do you understand by the term
(i)
Air
resistance (2
marks)
(ii)
Gravitational
force (2
marks)
(iii)
Viscous
force (2
marks)
(b) A
skydiver jumps from a plane and falls towards the Earth before his parachute
opens.
One
the diagram above, name the force (2 marks)
(i)
X
…………………………………………………………………………
(ii)
Y
…………………………………………………………………………
6.
(a)
(i) Define pressure (1 mark) (ii) State the SI unit of pressure (1 mark)
(b)
Explain
why dams are constructed thicker at the bottom than at the top (2
marks)
(c)
Name
four laboratory rules applied to a person using it. (4
marks)
SECTION
C (40 Marks)
7.
(a)
(i) State Hooke’s law. (2 marks)
(ii) Identity two applications of elasticity (2
marks)
(b)
Distinguish between
(i)
Elastic
material and plastic material (2
marks)
(ii)
Elastic
limit and plastic deformation (2
marks)
(c)
The spring stretched from 10cm to 22cm when a force 4N is applied. If it obeys
Hook’s law, what its total length when a force of 6N is applied? (2 marks)
8.
(a)
(i) Define matter. (1
mark)
(ii)
List three states of matter and give two
examples from each. (3 marks)
(b) Differentiate between solids, liquids and gases
in terms of
(i)
Forces
between the particles
(ii)
Distances
between the particles (6
marks)
(iii)
Movement
of molecules.
9.
(a)
Define the following terms:
(i) Upthrust (1
mark)
(ii) Real weight (1 mark)
(iii) Apparent weight (1 mark)
(iv) Apparent loss in weight (1
mark)
(b) A body
weighs 1.2 N in air and 0.9 N when completely immersed in water. Calculate
(i)
The
density of the body (3
marks)
(ii)
The
relative density of the body (3 marks)
10.
(a)
State two applications of Density and Relative Density. (3
marks)
(b) A glass
block of density 2500kg/m3 measures 20cm x 10cm x 50cm. Determine,
(i)
Volume
of the block in cubic meter (m3) (1
mark)
(ii)
Mass
of the block (2 marks)
(iii)
Weight
of the block (1
mark)
(v) Relative density of the block (3
marks)
*** THE END ***Ku-Download mtihani huu [ BOFYA HAPA ]