1. In the adjoining figure, the tension
in the string connecting A and B is
A)
g B) g C) 8g/9 D) 10g/9
2. Two masses of
1 kg and 5 kg are attached to the ends of a massless string passing over a
pulley of negligible weight. The pulley itself is attached to a light spring
balance as shown in the figure. The masses start moving during this interval,
the reading of spring balance will be
A) more than 6 kg
B)
less than 6 kg
C)
equal to 6 kg
D)
none of the above
3. A body of mass M hits normally a
rigid wall with velocity V and bounces back with the same velocity. The
magnitude of impulse experienced by the body is
A)
zero
B)
MV
C)
√2 MV
D)
2 MV
4. A force of 6N acts on a body at rest
and having a mass 4 kg. During the time of application of force, the body
attains a velocity of 30 m/s. The time for which the force acts on the body is:
A)
180 sec.
B)
20 sec.
C)
45 sec.
D)
24 sec
5. An object of mass 2 kg is sliding
with a constant velocity of 4 m/ s on a frictionless horizontal table. The
force required to keep the object moving with the same velocity is
A)
32N
B)
8N
C)
0
D)
2N
6. A bullet of mass 20gm is fired from a
gun of mass 8kg with a velocity of 400 m/s, calculate the recoil velocity of
gun
A)
1m/s
B)
-1m/s
C)
2m/s
D)
-2m/s
7. The action and reaction forces
referred to in the third law
A)
Must
act on the same object
B)
Must
act on different objects
C)
May
act on different objects
D)
Need
not be equal in magnitude but act in the same direction
8. Formula to find the average
velocity of a body is given by
A)
V=
u+ at
B) S= ut + ½ a t2
C) Sn ={u + a/2(2n-1)}
D) Vav=(u + v)/2
9. Force required in accelerating a 2 kg
mass at 5 m/s2 and a 4 kg mass at 2 m/s2
A)
Same
in both the cases
B)
2kg
mass at 5m/s2 is greater than 4 kg mass at 2 m/s2
C)
2kg
mass at 5m/s2 is less than 4 kg mass at 2 m/s2
D)
Zero
in both the cases
10. Which of Newton's laws best explains why motorists should buckle-up?
A)
the first law
B)
the second law
C)
the third law
D) the law of gravitation
11.A net force F acts on a mass m and produces an acceleration a. What acceleration results if a net force 2F acts
on mass 4m?
A)
a/2
B)
8a
C)
4a
D)
2a
12. Action-reaction forces are
A) equal magnitude and point in the same direction.
B)
equal magnitude but point in opposite directions.
C) unequal magnitude, point in the same direction.
D)
unequal magnitude, point in opposite directions
13. Which of the following has minimum
spaces among the particles?
A)
Solids
B)
Liquids
C)
Gases
D) None of these
14.
A change of state directly from solid to gas without changing into liquid state
(or vice versa) is called
A)
Evaporation
B)
Sublimation
C)
Diffusion
D)
Condensation
15.
Which of the following is the simplest form of matter –
A)
Element
B)
mixture
C)
compound
D)
none
of these
16. The rate of evaporation decreases
with
A)
increase
in humidity
B)
increase
of temperature
C)
increase
in wind speed
D)
increase
of surface area
17. On
converting 25°C, 38°C and 66°C to kelvin scale, the correct sequence of
temperature will be
A)
298
K, 311 K and 339 K
B)
298
K, 300 K and 338 K
C)
273
K, 278 K and 543 K
D)
298
K, 310 K and 338 K
18.
Area under velocity-time graph tells us the
A)
time
B)
acceleration
C)
displacement
D)
velocity
19. Time taken
by a train to slow down from 80 kmh-1 to 20 kmh-1 with a uniform deceleration
of 2 ms-2 is
A)
9
s
B)
10
s
C)
8.3
s
D)
8.4
s
20. The distance
(s) in metres travelled by a particle is related to time (t) in seconds by the
equation of motion S = 10t + 4t2. What is the initial velocity of
the body?
A)
10
m/s
B)
6
m/s
C)
4
m/s
D)
10
m/s2
21. When the distance that an object travels is directly
proportional to the length of time it is said to travel with
A) zero velocity
B) constant speed
C) constant acceleration
D)
uniform
velocity
22. A person travels distance πR along the circumference
of a circle of radius R. Displacement of the person is
A) R
B) 2R
C) 2Ï€R
D) zero
23. A body moving along a straight line at 20 m/s
undergoes an acceleration of 4 m/s2. After two seconds its speed
will be
A)
-8
m/s
B)
12
m/s
C)
16
m/s
D)
28
m/s
24.
Which
one of the following terms is used to indicate the natural tendency of an object
to remain at rest or in motion at a constant speed along a straight line?
A)
velocity
B)
acceleration
C)
inertia
D)
force
26. A 44-kg child steps onto a scale and the
scale reads 430 N. What is the magnitude of the normal force acting on the
child?
A)
44
N
B)
430
N
C)
860
N
D)
215
N
27. You are standing in a moving bus, facing forward,and you suddenly fall forward. You can imply from this that
the bus's
A)
velocity decreased.
B)
velocity increased.
C)
speed remained the same, but it's turning right
D)
speed remained the same, but it's turning left.
28. m/s2 is the SI unit of –
A) distance
B) displacement
C) velocity
D) acceleration.
29. Dry ice means –
A)
solid
SO2
B)
solid
water
C)
solid
CO2
D)
solid
CO
30. A state of matter which has a definite
shape and fixed volume –
A)
Solid
B)
liquid
C)
gas
D)
none
of these.
31. The act, process or state of the change in place or
position of a body with respect to time and relative to the observer is said to
be ………………
A) Rest
B) Stationary
C) Motion
D)
none
of the above
32.
Which type of motion of an object that moves in a straight line ?
A)
Rectilinear
motion
B)
Periodic
motion
C)
Circular
motion
D)
none
of the above
33.
The physical quantities used in displacement both direction and magnitude are
called as:
A)
Vectors
B)
Scalars
C)
S.I
D)
C.G.S
34.
The velocity of a body at a given instant is called as
A)
instantaneous
velocity
B)
uniform
velocity
C)
non-uniform
velocity
D)
none
of the above
35.
Mass of object is quantitative measure of its inertia stated law is newton's
A)
first
law
B)
second
law
C)
third
law
D)
fourth
law
36.
When a bus suddenly
takes a turn, the passengers are thrown outwards because of
A)
Inertia
of motion
B)
Acceleration
of motion
C)
Speed
of motion
D)
Both
(b) and (c)
37. A diwali rocket is ejecting 0.05 kg of gases
per second at a velocity of 400 m/sec. The accelerating force on
the rocket is
A)
20
m/sec
B)
20
N
C)
22
m/sec
D)
1000
N
38. A rocket is ejecting 50g of gases per
sec at a speed of 500m / s. The accelerating force on the rocket will be
A)
125N
B)
25
N
C)
5N
D) Zero
39. On Kelvin scale 0OC is equal to –
A)
273
K
B)
-273
K
C)
0
K
D)
100
K
40. When we add sugar in water, particles
of sugar disappear because they -
A)
are very small
B)
get into the spaces between water
particles
C)
are moving
D)
all above