SECTION: A Marks :
(12)
Q#1. Choose the
correct answer .
i.
The unit of acceleration
is_____________
a) ms b)
ms² c) m²s² d) ms
ii.
The Pin hole camera is invented
by__________
a) Al-Kindi b)
Al-Beruni c) Ibn-ul-Haithem d) Newton
iii.
A spring balance is used to measure the __________ of
a body.
a) Momentum
b) Weight c) Mass d) Motion
iv.
If Fx and Fy are rectangular components, then F
= ____________
a )
b)
c.)
d)
v.
For a body is thrown vertically upward, the value
of “g” is________
a) Positive
b) Negative c) Equal d) Constant
vi.
The rate of change of velocity of
a body is known as__________
a) Displacement b) Speed
c) Accelaration d) None of these
vii.
The motion of Fan is the example of _______ motion.
a) Translatory
b)
Vibratory c) Rotatory d)
Random
viii.
The error , which effect
equally all measurement taken
with the same instrument is called
a) Random Error b)
Systematic Error c) Personal Error d) None Of these
ix.
The meter rod can measure the length of a body
correct up to________
a) 1
mm b) 0.1 mm c) 0.01mm d) 10 mm
x.
Action and reaction are equal in
magnitude but ___________ in direction.
a) Same
b) Opposite c)
Parallel d) same
xi.
A
body is more stable if its center of gravity is________
A)
Low B) High C) May be anywhere D) None
xii.
The
decomposition of vector into its rectangular component is called _____of
vector?
A)
Addition B) Subtraction C) Resolution D)None
SECTION : B (33)
NOTE:- Attempt any 11 parts (11x3)
I.
Define
motion? Also explain types of motion
II.
The
height of a racing car is kept small. Why?
III.
Define
Torque? Also write its mathematical expression? On which factors torque
depends?
IV.
Why
First Law called Law of motion is called Law of inertia?
V.
How
do we know whether a body is in a stable or unstable state of equilibrium due
to position of its center of gravity?
VI.
Define
friction? Also write Advantages and Disadvatages of Friction?
VII.
Differentiate
between mass and weight?
VIII.
A
submarine dives 50 m at an angle of 30 wirh the horizental surface of the sea.
How deep the submarine is from the
surface?
IX.
State
Newton 2nd Law of motion?
X.
Give
an example of a case when the resultant force is zero but resultant of torque
is not zero?
XI.
A)
It is difficult to walk on muddy ground. Explain Why?
B)We fall forward
when car suddenly stop. Explain Why?
XII.
A
rocket is moving vertically upward 5 kg fuel gas is released out of it in the
downward with a velocity of 5000 ms. If the ,mass of rocket is 1000 kg. What
will be its velocity?
XIII.
Define AstroPhysics, Electromegnatism, And
Machanics?
XIV.
A)
Under what condition the distance and displacement between two points will
equal?
B) Which are those
two vectors whose resultant vector is zero?
XV.
What
is head to tail rule?
SECTION : C (20)
NOTE:- Attempt any two questions (10 x 2)
Q#1) A) Prove that 2aS
= Vf ² - Vi² (4)
B) The
mass of an astronaut is 100 kg.
i) What will be his weight on earth? II) Find its weight on moon. The value os
gravitational acceleration on moon is 1.6 ms
? (3)
C) Define Errors? Also explain its types? (3)
Q#2) A) State and explain Law of conservation of momentum
with examples? (4)
B) Define Equilibrium? Also Explain States of Equilibrium? (4)
C) A body moves along a straight
line from rest with an acceleration of 2 ms
.
Calculate the time taken by it to cover the distance of 100 m? (2)
Q#3) A) Define Resolution of vector? Resolve
vector F into its Rectangular Component? Also find magnitude and direction of
resultant vector? (6)
B)
Explain Ist condition of Equilibrium with example? (4)
THE END
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