Download 6. Physics - Tsenkharla MSS

Tsenkharla Middle Secondary School
Midterm Examination: 2012
Trashiyangtse
Index No:
Supervising Examiner’s/Invigilator’s initial:
Writing Time: 11/2hours.
Total Marks: 80 Marks
Paper 1 (IX Physics)
READ THE FOLLOWING DIRECTIONS CAREFULLY:
1. Do not write for the first fifteen minutes. This time is to be spent reading
the questions. After having read the questions, you will be given one and
a half hours to answer all questions.
2. In this paper, there are two sections: A and B. Section A is compulsory.
You are expected to attempt any four questions from Section B.
3. Read the directions to each question carefully and write all your answers
in the space provided in the Question booklet itself.
4. Do not leave the examination hall before you have made sure that you
have answered all the questions.
This booklet contains 16 Pages
………………………………………………………………………………………………
For Chief Marker’s and Markers' Use Only
Question
Numbers
Section A
Q1.a
Q1.b
Q1.c
Section B
Q1.d
Q1.e
Q.2
Award
Marker’s
Initial
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Page 1 of 16
Q3
Q4
Q5
Q6
Q7
SECTION A (40 Marks)
Compulsory: To be attempted by all candidates.
Question 1.
(a). Direction: Each question in this part is followed by four possible choices of
answers. Choose the correct answer and write it in the space provided in the
question booklet.
(15)
(i). An example for fundamental unit is:
A.
B.
C.
D.
Newton
Second
Dyne
Kgms-1
Answer: ………………………………………………
(ii). Number of vibrations made by vibrating object in one second is
A.
B.
C.
D.
Amplitude
Period
Oscillation
Frequency of oscillation
Answer: …………………………………………………
(iii). The density of water is maximum at
A.
B.
C.
D.
40C
00C
1000C
100C
Answer: ……………………………………………………
(iv). The density of body is 5.7gcm-3. Its value in SI system will be
A.
B.
C.
D.
570Kgm-3
0.0057Kgm-3
5700Kgm-3
5.7gcm-3
Answer: …………………………………...
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(v). A particle moves 50cm from A to B and return from B to C by 14cm as
shown in figure below. The displacement of particle is
A.
B.
C.
D.
A
50 cm
64cm
14cm
36cm
B
C
Answer: ………………………………………
(vi). CGS unit for torque is
A.
B.
C.
D.
Dyne cm
Newton meter
Kgms-2
gcms-2
Answer: ………………………………………
(vii). Inertia of a body depends on:
A.
B.
C.
D.
Weight of the body
Mass of the body
Momentum of the body
Impulse of the body
Answer: …………………………………………
(viii). Force acting on a body is equal to
A.
B.
C.
D.
Momentum
Change of momentum
Rate of change of momentum
Rate of change of velocity
Answer: ……………………………………………
(ix). When an object undergoes acceleration
A. Its speed always increases
B. A Force always acts on it
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C. Its velocity always increases
D. It always falls towards earth
Answer: ……………………………………………
(x). A force of 20N is applied on a block, but the block does not move. The
frictional force of a body would be:
A.
B.
C.
D.
20N
More than 20N
Less than 20N
10N
Answer: ……………………………………………
(xi). One day has:
A.
B.
C.
D.
60 Seconds
24 seconds
365 days
86400 Seconds
Answer: ……………………………………………
(xii). which of the following friction has a maximum magnitude?
A.
B.
C.
D.
Limiting friction
Kinetic friction
Rolling friction
Static friction
Answer: …………………………………………
(xiii). The velocity of a body decreases from 80ms-1 to 20ms-1 in 10s. The
retardation will be
A.
B.
C.
D.
20ms-2
6ms-2
60ms-2
10ms-2
Answer: …………………………………….
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(xiv). The relationship between linear momentum, mass and velocity is
A.
B.
C.
D.
m = pv
p = mv
v= m/p
pmv = 1
Answer: ……………………………………………
(xv). Which of the following is scalar quantity?
A.
B.
C.
D.
Displacement
Velocity
Force
Speed
Answer: …………………………………………………
(b). Direction: Fill in the blanks with a appropriate terms
(5)
(i). A simple pendulum which has time period of two second is called
………………………………………………
(ii). CGS unit of density is …………………………..
(iii). If the body is projected upward at highest point, its final velocity is
………………………………………………..
(iv). The force which opposes the relative motion between two surfaces in
contact is …………………………………………..
(v). Detaching of an apple from tree when laden with sticks is due to
……………………………………………………..
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(C). Match each item under column A with the most appropriate in
Column B. You must rewrite the correct matching pairs in the space
provided.
(5)
Column A
(i). Principle of moments
Column B
(a). Screw Gauge
(iii) Newton’s third
(c). Tension force
(ii). Contact force
(b). Newton
(iv). Force
(d) . Spring balance
(v). Pitch
(e). Motion of rocket
(f). Beam balance
(g). Vernier Callipers
Column A
Column B
………………………………………………
…………………………………………….
…………………………………………….
……………………………………………
………………………………………………
……………………………………………
………………………………………………
…………………………………………….
……………………………………………..
……………………………………………
………………………………………………
………………………………………….
(c). Direction: State whether the following statements is true or false.
Correct the wrong statement
(5)
(i). The density of water at 40C is 1000gcm-3
……………………………………………………………………………………………………………………
(ii). A light year is a bigger unit of length
……………………………………………………………………………………………………………………
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(iii). The rate of change of momentum is inversely proportional to force acting
on a body.
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
(iv). A torque is positive, if it tends to rotate the body in clockwise
……………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………
(v). The displacement of body is zero when it completes one round in a
circular path
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
(e). Direction: Answer the following questions:
(i). What do you understand by the term density. State its SI unit.
(2)
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
(ii). Out of two bodies of masses 3Kg and 9Kg, which one has more inertia? (1)
……………………………………………………………………………………………………………………
(iii). Give one example where the body possesses translational motion as well
as rotational motion
(1)
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
(iv). State two methods of reducing friction
(2)
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………..
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(v). A pendulum completes 8 oscillation in 10s. What is it’s time period? (2)
(vi). A boy moves 8m towards east and 6m towards south
Calculate: (a). Distance covered by the boy
(1)
(1)
(b). Displacement of the boy
SECTION B (40 Marks)
Attempt ANY FOUR questions
Question: 02
(i). Define estimation
(1)
…………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………
(ii). Differentiate between Fundamental units and Derived units
(2)
…………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………….
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(iii). Explain the following
(a). When a moving train or bus suddenly stops, the passenger falls forward
(1)
……………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………
(b). A man standing on a boat, suddenly jumps towards the shore. The boats
get a jerk in opposite direction
(1)
………………………………………………………………………………………………………….…………
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
(c). The bodies of aeroplanes, missiles and rockets are streamline.
(1)
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
(d). The handle of a door is fixed at a larger distance from the hinge
(1)
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
(iv). A Screw Gauge has 100 divisions in the thimble as shown in the following
figure
(1)
Calculate: (a). Pitch of the Screw Gauge
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(b). Least count of the Screw Gauge
(1)
(c). Diameter of the wire
(1)
Question 03
(i). Define acceleration. State SI unit of acceleration
(2)
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
(ii). Differentiate between Translational motion and Rotational motion
(2)
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
(iii). Give THREE disadvantages of friction
(3)
…………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
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(iv). A motor car running at a velocity of 10ms-1 picks up a velocity of 50ms-1
in 5s.
Calculate: (a). Acceleration of a motor car
(b). Distance covered during acceleration by a motor car
(v). State Newton’s Third Law of Motion.
(1)
(1)
(1)
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
Question 04
(2)
(i). State Newton’s First Law of Motion
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
(ii). State action and reaction forces in the following cases
(a). Firing of bullet
(1)
……………………………………………………………………………………………………………… ……
……………………………………………………………………………………………………………………
(1)
(b). Hammering of nail
……………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………
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(1)
(c). A person walking on the ground
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
(iii). Compare contact forces and non contact forces with one example each
(3)
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
(iv). The mass of a piece of iron is 20Kg and its volume 20m3.
Calculate density in (a). Kgm-3
(1)
(1)
(b). gcm-3
Question 05
(i). Define momentum. State its unit in CGS.
(2)
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
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(2)
(ii). State Principal of moments
……………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………
(1/2 + 1/2 + 1/2 +1/2)
(iv). Complete the followings
(a). 1Litre = …………………………………. cm3
(b). 1 quintal = ……………………………… Kg
(c). 1 newton = ……………………………… Dyne
(d). 1 century = …………………………….. days
(iv). A force of 50N acts on a body and the acceleration produced was 5ms-2.
Calculate the mass of the body
(2)
(iii). Two equal and unlike parallel forces of magnitude 50N act on a rigid
body, such that the moment of couple is 25Nm. Calculate the arm of couple
(2)
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Question 06
(1)
(i). Define least count of an instrument
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
(ii). Give two applications of couple action in daily life
(2)
…………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………
(iii). Distinguish between distance and displacement of a body
(2)
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
(iv). The least count of a vernier calliper is 0.01cm and has an error of
+0.05cm. While measuring the radius of a sphere, the main scale reading is
2.80cm and 6th Vernier scale division coincides with main scale. Calculate the
radius of the sphere
(3)
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(v). Friction is necessary evil. Give TWO reasons to support the statement (2)
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
Question 07
(i). Define acceleration due to gravity. State its average value on the surface of
the earth in SI unit
(2)
……………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………
(ii). What do you understand by the term inertia? State TWO kinds of inertia
(3)
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
(iii). State relationship between absolute units of force and gravitational units
of force
(2)
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
………………………………………………………………………………………………………………….
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(iv). A body initially at rest starts moving with a constant acceleration of 2ms-2
and travel a distance of 50m
Calculate (i). The final velocity of a body
(ii). Time taken to covered the distance
………….BEST OF LUCK…………
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