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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

—