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Q. 1

A

B

C

D

Q. 2

A

B

C

D

Q. 3

A

B

C

D

Q. 4

A

B

C

D

Q. 5

A

B

C

D

Q. 6

A

B

C

D

Q. 7

A

B

C

D

Q. 8

A

B

C

D

Q. 9

A

B

C

D

Q. 10

A

B

C

D

Q. 11

If the KE of a body becomes four times of its initial value, then the new momentum will be :

three times its initial value

four times its initial value

twice its initial value

unchanged.

Q. 12

A shell explodes and many pieces fly off in different directions. The following is conserved

Kinetic energy

Momentum

Neither momentum nor KE

Momentum and KE

Q. 13

A

B

C

D

Q. 14

A

B

C

D

Q. 15

A

B

C

D

Q. 16

Choose incorrect one. If no external force acts on a system

Velocity of centre of mass remains constant

Velocity of centre of mass is not constant

Velocity of centre of mass may be zero

Acceleration of centre of mass is zero

Q. 17

A

B

C

D

Q. 18

A

B

C

D

Q. 19

A

B

C

D

Q. 20

A body is dropped and observed to bounce a height greater than the dropping height. Then :

the collision is elastic

there is additional source of energy during collision

it is not possible

this type of phenomenon does not occur in nature

Q. 21

A rocket works on the principle of conservation of

mass

kinetic energy

linear momentum

angular momentum.

Q. 22

Choose the correct definition of impulse :

impulse is defined as rate of change of momentum of particle

impulse is defined as change in momentum of a particle

impulse is defined as the integral of force with respect to time

both 2 and 3 are correct

Q. 23

A

B

C

D

Q. 24

A

B

C

D

Q. 25

A bomb projected in a parabolic path under the effect of gravity, explodes in mid air. The centre of mass of fragments will

move vertically upwards and then downwards

move vertically downwards

move in irregular path

move in the parabolic path as the unexploded bomb would have moved.

Q. 26

a

b

c

d

Q. 27

A

B

C

D

Q. 28

The centre of mass of a body :

Lies always at the geometrical centre

Lies always inside the body

Lies always outside the body

May lie within or outside the body.

Q. 29

A

B

C

D

Q. 30

A

B

C

D

Q. 31

A

B

C

D

Q. 32

A

B

C

D

Q. 33

A

B

C

D

Q. 34

A

B

C

D

Q. 35

A

B

C

D

Q. 36

A

B

C

D

Q. 37

A

B

C

D

Q. 38

A

B

C

D

Q. 39

A

B

C

D

Q. 40

A

B

C

D

PHYSICS QUIZ 108(COLM)

Marks: 200