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1. When body is in motion, ________ always changes. A.
its velocity
B.
its acceleration
C.
its position vector
D.
its momentum
2. A body is moving with uniform velocity. Its A. speed changes B. acceleration changes
C.
direction of motion changes
D.
displacement from srcin changes
3. A man is in a car is moving with velocity of 3!m"hr. #is speed with repect to the car is A.
1$m"s
B.
3m"s
C.
zero
D.
infinite
%. When velocity time graph is a straight line parallel to time a&is then A.
acceleration is const
B.
acceleration is variable
C.
acceleration is zero
D.
velocity is 'ero
(. Area under velocity time graph represent A.
force
B.
displacement
C.
distance
D.
acceleration
. )lope of velocity time graph is A.
acceleration
B.
*istance
C.
force
D.
+omentum
. Instantaneous and average velocities become e-ual when body
A.
has zero acceleration
B.
has uniform acceleration
C.
has variable acceleration
D.
moves in a circle
. Which law of motion is also called law of inertia/
0.
A.
1st law
B.
2nd law
C.
3rd law
D.
all 1st, 2nd and 3rd laws
Inertia of an obect is -uantitative measure of its A.
volume
B.
*ensity
C.
mass
D.
emperature
1$. ewtons laws do not hold good for particles A. at rest B. moving slowly
C.
move with high velocity
D.
move with velocity comparable to velocity of light
11. 1st law of motion gives the definition of A.
rest
B.
+otion
C.
velocity
D.
Force
12. 2nd law of motion gives the definition of A.
force
B.
Acceleration
C.
velocity
D.
both force and acceleration
B.
e&istence of a force
13. 3rd law of motion e&plains A.
effect of force
C.
e&istence of two forces
D.
existence of pair of forces in nature
1%. +omentum depends upon A.
force acts on the body
B.
mass of the body
C.
velocity of the body
D.
both mass and velocity of the body
1(. he dimension of force is A.
!"#$
B.
+4252
C.
+422
D.
+45252
1. When a body moves in a straight line then its displacement coincides with A.
distance
B.
force
C.
acceleration is 'ero
D.
both 6a7 and 6b7
1. Which of the following pair has same direction always/ A.
force, displacement
B.
force, velocity
C.
force% acceleration
D.
force, momentum
1. +otorcycle safety helmet e&tends the time of collision hence decreasing the A.
chance of collision
B.
force acting
C.
velocity
D.
&mpulse
10. he collision between two bodies be elastic if bodies are A.
solid and soft
B.
soft and elastic
C.
solid and hard
D.
hard and elastic
2$. *uring long ump, athlete runs before ta!ing the ump. 8y doing so he A.
provide him a larger inertia
B.
decreases his inertia
C.
decreases his momentum
D.
increases his momentum
21. When car ta!es turn around a curve road, the passengers feel a force acting on them in a direction away from the center of the curve. It is due to A.
centripetal force
B.
gravitational force
C.
their inertia
D.
centrifugal force
22. A body is falling freely under gravity. #ow much distance it falls during an interval of time between 1st and 2nd seconds of its motion, ta!ing g91$/ A.
1' m
B.
2$ m
C.
(m
D.
2( m
23. What is the shape of velocity, time graph for constant acceleration/ A.
straight inclined line.
B.
parabola
C.
inclined curve
D.
declined curve
2%. When collision between the bodies in a system is inelastic in nature then for system A.
momentum changes but :.; remain conserve
B.
(.) changes but momentum remain conserve
C.
both momentum and :.; changes
D.
both momentum and :.; remain conserve
2(. Which shows the correct relation between time of flight and ma&imum height #/
A.
*+g"$,-
B.
#92"g
C.
#9g"2
D.
#9g2
2. he acceleration in the roc!et at any instant is proportional to the nth power of the velocity of the e&pelled gases. Where the value of n must be/ A.
51
B.
1
C.
2
D.
52
2. a!ing off roc!et can be e&plained by A.
1st law of motion
B.
2nd law of motion
C.
!aw of conservation of momentum
D.
law of conservation of energy
2. Which of the following is not an e&le of proectile motion. A.
a gas filled ballon
B.
bullet fired from gun
C.
a football !ic!ed
D.
a base ball shot
20. What is the angle of proection for which the range and ma&imum height become e-ual/ A.
tan51 1"%
B.
tan#1 '
C.
tan51 1"2
D.
tan51 2
3$. he thrust on the roc!et in the absence of gravitational force of attraction is A.
constant
B.
not constant
C.
constant if the rate of eected gases is constant
D.
constant for short range roc!et
31. When two bodies move toward each other with constant speeds the distance between them decreases at the rate of m " sec. If they move
in the same direction the distance between them increases at the rate of %m"sec. hen their speeds are A.
m,s% 1m,s
B.
3m"s, 3m"s
C.
m"s, 1m"s
D.
%m"s, 2m"s
32. *istance covered by a freely falling body in 2 seconds will be A.
%.0 m
B.
1/.0 m
C.
30.2 m
D.
%%.1 m
33. he distance covered by a body in time t starting from rest is A.
at$,$
B.
C.
a2t"2
D.
at2
3%. =light of a roc!et in the space is an e&le of A.
second law of motion
B.
third law of motion
C.
first law of motion
D.
law of gravitation
3(. he traectory 6or path7 of a proectile is A.
straight line
B.
parabola
C.
hyperbola
D.
circle
3. At which angle the range of the proectile is ma&imum A.
'
B.
$/
C.
3$/
D.
none
3. he force beared by a wall on which water stri!es normally at a speed of 1$m"sec and at a discharge of $.$$$1m3"sec is.
A.
12
B.
1$
C.
1$$
D.
none
3. ime rate of change of momentum is e-ual to A.
force
B.
impulse
C.
velocity
D.
both 6a7 and 6c7
30. he range of the proectile at 3$/ and $/ are A.
e-ual to %(/
B.
e-ual to 0$/
C.
e3ual to each other
D.
none of the above
%$. Why 8allistic missile fails in some circumstances of precision. A. due to their shape B. due to air resistance C.
