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hittagong
Cantonment
Public College
Half Yearly
Exam-2015 Sub.Code:
174
Class
:
XI
Subject: Physics lst
Paper
(Creative Part)
Time:
2hrs
10
minutes
(Answer any four questions)
Full
Marks :
40
l.
Boat moves
along
OA
What is
angular
momentum?
Write down the differences between divergence and curl.
Find
out the
force applied
by the Dar of
the
boat.
How
will
the boat
progress
in
a
more easier
way along
the
same
direction by applying the same force
F.
Explain with
mathematical
logic.
2. In a cricket match of BPL Musfiqur Rahim strike
ball
by the
bat,
for
which
the ball projected with the
velocity of
25ms‘l and angle of
prqjection 30°.
The distance of boundary line from the point
of
projection is
75m
towards which
direction
the ball s
moving.
Tamim
moves from the boundary line with
velocity of
lOms l
just
opposite
the
direction of the ball
to catch
it.
a.
What is
weak nuclear
force?
b. Explam with uses
of
the
conservation of
angular momentum. 2
c.
Find
out the time
of
flight
of
the
ball.
d.
Explam’
with mathematical
logic
the
possibility
of catch out of
Musfiqur by Tamim.
\‘
9
0
9
»
4
Y4
/
‘x
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Radius of earth is
6.4x106m. The mass
of
object at
point P
is 20kg
mass of
earth
is 6x1024kg
\ ,_,
a. Write down Kepler s second
law
ofplanatory motion.
b.
Gravity
is
conservative
force
explain
it.
c. Find out the lm ear velocity of object at point P.
d.
Calculate
the
difference of
weight of the object,
if
the object
moves
from
P to Q.
1
2
3
4
Two
institutions
named
A
and
B
produce rod. The comparative
analysis
of
the
two
kinds
of
rod produced
by
those institutions
A and
B are
given
graphically.
The
initial
length
and radius
of
two
rods
are
same and
Y.
valueeis respectively
10m
and Scm.
b
extension (cm)
What
is
compressibility?
Write down the differences between metalic bond and vandar
walls
bond.
Calculate the young
modulus
of elasticity of rod A.
Which
rod
is
more
convenient for making a building
explain
with mathematical logic.
1
9
‘
s
»
2
3
4
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5.
In
the
figure
the
effective
length
of
pendulum
is
2m.
OB
is
the
maximum
amplitude
position of
pendulum
mass of bob is ng
a.
State
work energy theorom.
b.
Establish
the
relation
among
power,
force
and
velocity.
c. Calculate the mechanical
energy
at pom t B.
1. Find
out
the
ratio
of
kinetic
energies
at
point
A
and
C.
m : ‘1
HIP—WK?”
0a
«3
@002
Ft
W I :
[ O M 3 ’
V
5W4?
Befor
Collision
Collision
a.
What is moment of inertia?
b.
Why
centripetal
force
is work
less
force?
0. Find
out
the
combined
velocity
after
collission.
d. What
kind of
collission
is it?
Explain
with mathematical
logic.
W1 My
V f; v94 .
After
Collision
4
5
t
h
W
N
—
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