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1. If a rock is brought from the surface of the moon :
(A) Its mass will change (B) Its weight will change, but not mass.
(C) Both mass and weight will
change (D) Its mass and weight will remain the same.
ANS : B
2. When an object undergoes acceleration :
(A) Its speed always increases (B) Its velocity always increases
(C) It always falls towards
the earth (D) A force always acts on it
ANS : D
3. External forces are :
(A) Always balanced
(B) Never balanced
(C) May or may not be balanced (D) None of these
ANS : C
4. The net force acting on a body of mass 1 kg moving with a uniform velocity
of 5 ms–1 is :
(A) 5 N (B) 0.2 N (C) 0 N (D) None of these
ANS : C
5. How many dynes are equal to 1 N?
(A) 106 (B) 104 (C) 105 (D) 103
ANS : C
6. A force can :
(A) Change the direction of a moving
body
(B) Change the state of rest or uniform motion of a body.
(C) Change the shape of a body (D) All of the above
ANS : D
7. The S.I. unit of pressure is –
(A) Newton (B) Dyne/cm2 (C) Pascal (D) Joule
ANS : C
8. Which among the following will exert maximum pressure when pushed with the
same amount of force?
(A) An eraser of area 2 cm2 (B) A sharpened pencil tip
(C) The blunt end of a
pencil (D) The rear portion of a closed safety pin
ANS : B
9. Pressure is also measured in :
(A) Joule (B) mm of Hg (C) mm of Ag (D) Metre
ANS : B
10. Force per unit area is called :
(A) Energy
(B) Work
(C) Pressure (D) Thrust
ANS : C
11. Atmospheric pressure is measured by :
(A) Barometer (B) Manometer (C) Screw gauge (D) None of these
ANS : A
12. A manometer is used to measure :
(A) Height (B) Pressure (C) Liquid density (D)Atmospheric pressure
ANS : B
13. How does pressure vary as we come from mountain top to sea level?
(A) Increases (B) Decreases (C) Remains same (D)Dependsonweather
ANS : B
14. As we go deeper beneath the surface of liquid, the pressure :
(A) Remains same (B) Increase (C) Decreases (D)Dependsonweather
ANS : A
15. A vacuum cleaner works on the principle of :
(A) Electromagnetic Induction (B) Suction
(C) Mutal Induction
(D) Energy conservation
ANS : B
16. The S.I. unit of force is :
(A) metre (B) Newton (C) Pascal (D) Second
ANS : B
17. A contact force cannot act through
(A) Empty space (B) Touching
(C) Touching with a metal
rod (D) Touching with a wooden rod
ANS : A
18. Which of the following is a unit of pressure?
(A) Metre
(B) Newton (C) Square metre (D) Pascal
ANS : D
19. Deep-sea diving vessels have to withstand pressure from the crushing effect
of sea water acting :
(A) Upwards (B) Downwards (C) Side ways (D) In all directions.
ANS : A
20. Which among the following will exert maximum pressure when pushed with the
same amount of force?
(A) An eraser of area 2 cm2 (B) A sharpened pencil tip
(C) The blunt end of a pencil (D) The rear portion of a closes safety pin.
ANS : D
21. Which of the following is a type of a pressure gauge?
(A) Speedometer (B) Manometer (C) Syringe (D) Thermometer
ANS : B
22. Which of these is not a contact force?
(A) Friction (B) Muscular force (C) Magnetic force (D) None of these
ANS : C
23. A force has :
(A) Magnitude only (B) Direction only
(C) both magnitude and direction (D) None of these
ANS : C
24. When a force is applied on a body it may change its
(A) Speed only (B) Direction only
(C) both speed and direction (D) None of these
ANS : C
25. When we press the bulb of a dropper with its nozzle kept in water, air in
the dropper is seen to escape in the form of bubbles. Once we release the
pressure on the bulb, water gets filled in the dropper. The rise of water in
the dropper is due to :
(A) Pressure of water
(B) Gravity of the earth
(C) Shape of rubber bulb (D) Atmospheric pressure
ANS : D
26. Gravitational force acts :
(A) Only between the sum and the
planets moving around it.
(B) Only between the earth and the
bodies on it
(C) Between all bodies in the
universe
(D) Only between the sun and the
earth
ANS ; C
27. The relation between the S.I. unit of force and the weight of a 1 kg mass
is :
(A) 1 kg of = 1 N (B) 1 kg of = 0.98 N (C) 1 kg of = 9.8 N (D) 1 N = 9.8 kg
ANS : C
28. If a force of 100 N acts on an area of 10 m2, the pressure equal :
(A) 100 N/m2 (B) 10 N/m2 (C) 1000 N/m2 (D) 1000 Nm2
ANS : A
29. 1 dyne is equal to :
(A) 980 g wt (B) 1/980 g wt (C) 980 kg wt (D) None of these
ANS : B
30. Which of the following class of force is different from others?
(A) magnetic force (B) Electrical force
(C) Gravitational force (D) Stretching of a spring
ANS : D
31. A box is pulled by two forces but in opposite direction as shown in below
figure (in which direction of you the box will move)
(A) Left Side
(B) Right side (C) don't move (D) can't says
ANS : A
32. When two forces applied on an object are equal and opposite, then these
forces
(A) may move the object.
(B) may stop a moving object.
(C) may move the object and also cause a change in its shape.
(D) do not move the object but may cause a change in its shape.
ANS : D
33. When two unbalanced forces act on a body, in opposite directions, the net
force is equal to
(A) the sum of the individual unbalanced forces.
(B) zero.
(C) difference between the two unbalanced forces and is in the direction of
the larger force.
(D) difference between the two unbalanced forces and is in the direction of
smaller force.
ANS : C
34. 1 kilogram weight is
(A) 98 N
(B) 9.8 N (C) 0.98 N
(D) 0.098 N
ANS : B
35. A batsman hits a cricket ball which then rolls on the level ground. After
covering a short distance the ball comes to rest. The ball stops due to
(A) magnetic force
(B) frictional force
(C) gravitational force (D)
muscular force
ANS : B
36. Fruits falling from trees is an example of
(A) Gravitational force (B) Muscular force (C) Frictional force
(D)
Electric force
ANS : A
37. Which physical quantity of a body always remains constant ?
(A) mass (B) weight (C) speed (D) force
ANS : A
38. Which of the following types of forces is not a contact force ?
(A) muscular force (B) frictional force (C) magnetic force (D) none of these
ANS : C
39. The force between two charged bodies is called
(A) Muscular Force (B) Gravitational force (C)
Magnetic force (D) Electrostatic force
ANS : D
40. Leaves or fruits fall on the ground due to
(A) Magnetic force (B) Gravitational force (C)
Electrostatic force (D)
Muscular force
ANS : B
41. Magnetic force is
(A) Contact force
(B) Non-contact force (C) both (A) and (B)
(D) None.
ANS : B
42. The force exerted by animal body is called
(A) muscular force
(B) mechanical force (C) gravitational force (D)
magnetic force
ANS : A
43.
Which among the following will exert maximum pressure when pushed with the
same amount of force?
(A) An eraser of area 2 cm2
(B) A sharpened pencil tip
(C) The blunt end of a pencil (D) The rear portion of a closed safety pin
ANS : B
44. When a force is applied over a larger area, the pressure produced will
.
(A) increase
(B) decrease (C) both (A) and (B)
(D) none of
these
ANS : B
45. Pressure is also measured in .
(A) joule
(B) mm of Hg (C) mm of Ag
(D) meter
ANS : B
46. Force per unit area is called
(A) Energy
(B) work
(C) pressure
(D) trust
ANS : C
47. When a force is applied to a body of mass 2kg, its velocity changes from 20
m/s to 30 m/s in 2 sec. the rate of change of momentum of the body is
(A) 10 kg ms–1 (B*) 10 N
(C) 0.1 N
(D) 10 kgm
ANS : B
48. The momentum of a body of given mass is proportional to
(A) its colour (B) its velocity
(C) its volume
(D) its shape
ANS : B
49. When an increase in speed doubles the momentum of a object, the object's
kinetic energy
(A) increases but does not double
(B) doubles
(C) more than doubles (D) information
ANS : C
50. SI unit of thrust is
(A) N (B) kgm–3 (C) Nm–2 (D) kgNm–3
ANS : A
51. When we press the bulb of a dropper with its nozzle kept in water, air in
the dropper is seen to escape in the form of bubbles. Once we release the
pressure on the bulb, water gets filled in dropper. The rise of water in the
dropper is due to
(A) Pressure of water (B) gravity of the earth
(C) shape of rubber bulb
(D) atmospheric pressure.
ANS : D
52.
Atmospheric pressure is measured by :
(A) Barometer (B) manometer (C) screw gauge
(D) none of these
ANS : A
53. A force of 50 N is applied on a nail of area 0.001 sq. cm. then the thrust
is
(A) 50 N (B) 100 N
(C) 0.05 N
(D) 10 N
ANS : A
54. How does pressure vary as we come from mountain top to sea level?
(A) increases (B) decreases (C) remains same (D) depends on weather
ANS : A
55. As we go deeper beneath the surface of a liquid, the pressure:
(A) remains same (B) increases (C) decreases (D) depends on weather
ANS : B
56. A vacuum cleaner works on the principle of :
(A) Electro Magnetic Induction (B) Suction
(C) Mutual Induction
(D) Energy conservation
ANS : B
57. A wooden piece 5 N in weight and 5 cm × 3 cm × 2 cm in size lies on 5 cm ×
2 cm face. The pressure exerted by it in N per cm2 is
(A) 150
(B) 50 (C) 0.5
(D) 15
ANS : C
58. An iron block sides 5 cm × 10 cm × 15 cm is kept on the floor. The presure
exerted by it is minimum if it kept as :
(A) 5 × 10 cm sides (B) 10 × 15 cm sides (C) 5 × 15 cm sides (D) by any two sides
ANS : B
59. Astronauts wear space suits during space walk in space in order to maintain
the :
(A) Vacuum pressure
(B) space pressure
(C) Atmospheric pressure (D) space shuttle pressure
ANS : C
60. Rockets work on the principle of conservation of
(A) mass (B) momentum (C) energy (D) Impulse
ANS : B
61. The law of conservation of momentum holds for
(A) individual particles
(B) only for two particles
(C) A system of particles
(D) only for three particles
ANS : C
62. The law of conservation of momentum states that the sum of momentum of two
objects before collision is equal to the sum of momenta after collision
provided that
(A) No internal unbalanced force acts on them (B) No external unbalanced force acts on them
(C) No external balanced force acts on them (D) No internal balanced force acts on them
ANS : B
63. The momentum of an isolated system remains conserved provided
(A) Net final momentum of the system is zero (B) Net external force of the system is non-zero
(C) Net initial momentum of the system is zero (D) Net external force on the system is zero
ANS : D
64. Find the impulse and force which make 12 m/s change in the velocity of
object having 16 kg massin 4 sec
(A) F = 48 N, I = 12 kgms–1 (B) F = 48 N, I = 192 kgms–1
(C) F = 160 N, I = 640 kgms–1 (D) F = 160 N, I = 40 kg ms–1
ANS : B
65. Two objects each of mass 1.5 kg are moving in the same straight line but in
opposite directions. The velocity of each object is 2.5 m/s before the
collision during which they stick together. What will be the velocity of the
combined object after the collision ?
(A) 2.5 m/s
(B) 5 m/s
(C) zero
(D) 3 m/s
ANS : C
66. A ball of mass 5 kg moving at 3 m/s collides with another ball of mass 3 kg
moving at 5 m/s in the same direction. If the balls move together after the
collision in the same direction, find their common velocity
(A) 5 m/s
(B) 3.75 m/s
(C) 6.25 m/s
(D) 7.5 m/s
ANS : B
67. A man pushes a moving ball on a frictionless floor. If the man pushes with
force 11 N for 5 seconds, what is the change of momentum of ball.
(A) 5 N-S
(B) 55 N-S
(C) 11 N-S
(D) 137 N-S
ANS : B
68. A fielder giving a swing while catching a ball is an example of
(A) Inertia (B) Momentum
(C) Newton's II law of motion (D) Newton's I law of motion
ANS : C
69. When a given force is
applied on larger area of contact the pressure exerted by it:
(A) increases (B) decreases (C) does not change (D) none of these
ANS : B
70. The pressure exerted by a
liquid:
(A)
decreases with depth (B) does not change with depth
(C) increases with depth (D) is different in different directions at he same depth
ANS : C
71. A force can:
(A) change the state of motion (B) change the shape of an object
(C) change the direction of motion of an object (D) all of these
ANS : D
72. Force is:
(A) only push on an object (B) only pull on an object
(C) either push or pull on an object (D) none of these
ANS : C
73. Liquids exert
pressure on the walls of the container:
(A) yes (B) no (C) can’t say (D) none of these
ANS : A.
74. The pressure
exerted by the air is known as:
(A) air pressure (B) gas pressure
(C) atmospheric pressure (D) none of these
ANS : C
75. When a rubber sucker is
pressed on a plane surface than it sticks to the surface because of :
(A) the pressure exerted by us (B) the air sucked by rubber
(C) the pressure of atmosphere acting on it (D) none of these
ANS : C
76. The instrument used of
measure atmospheric pressure is:
(A) mercury barometer (B) manometer (C) pressure meter (D) none of these
ANS : A
77. The force exerted on a
normal human being due to atmospheric pressure is:
(A) 2 x 10<sup>4</sup>N (B) 2 x 10<sup>5</sup>N
(C) 2 x 10<sup>6</sup>N (D) none of these
ANS : A
78. The weight of air that
every square centimetre of any surface carries is:
(A) 1 kg (B) 10 kg (C) 1 gm (D) 100 kg
ANS : A
79. When bicycle tube
is punctured than:
(A) it bursts (B) air escapes very fast
(C) air escapes slowly (D) none of these
ANS : C
80. We are not
crushed under the weight of air because:
(A) air has no weight
(B) the pressure inside our bodies is equal to atmospheric pressure
(C) the pressure inside our bodies is more than atmospheric pressure
(D) none of these
ANS : B
81. The non-contact
force is:
(A) magnetic force (B) electrostatic force (C) force of gravity (D) all of these
ANS : D
82. A boat comes to
rest if we stop rowing it due to:
(A) gravitation force (B) force of friction
(C) muscular force (D) none of these
ANS : B
83. A football moves when
we:
(A)pushit (B) hit it (C) kick it (D) all of these
ANS : D.
84. Which of the
following is contact force:
(A) force of gravity
(B) magnetic force
(C) force of friction
(D) electrostatic force
ANS : C
85. The non-contact
force is:
(A) force of gravity (B) muscular force
(C) force of friction (D) none of these
ANS : A.
86. Pressure =
(A) force/area (B) force x area (C) area/force (D) none of these
ANS : A
87. Knives, needles, saws are
made sharp or pointed to:
(A) decrease pressure (B) can’t say (C) increase pressure (D) none of these
ANS : C
88. The pressure with the
height of the liquid column.
(A) increase (B) remains same (C) decrease (D) none of these
ANS : A
89. By decreasing the
contact area the pressure:
(A) is decreased (B) remain same (C) is increased (D) none of these
ANS : C
90. The unit of pressure is:
(A) Newton (B) Newton/metres (C) Newton metres (D) Newton/metre
ANS : A
91. The instrument used to
measure pressure of liquids is:
(A) barometer (B) manometer (C) pressure meter (D) none of these
ANS : B
92. When we
press the bulb of a dropper with its nozzle kept in water, air in the
dropper is seen to escape in the form of bubbles. Once we release the
pressure on the bulb, water gets filled in the dropper. The rise of water in
the dropper is due to:
(A) pressure of water (B) gravity of the earth
(C) shape of rubber bulb (D) atmospheric pressure
ANS : D
93. Pushing a rock from a
hill top is an example of:
(A) muscular force (B) magnetic force
(C) frictional force (D) electrostatic force
ANS : A
94. Under which
condition can a moving object charge its direction:
(A) by reducing friction (B) by increasing friction
(C) by applying force (D) by not applying force
ANS : C
.
95. A stone
thrown with a catapult (Gulal) falls back on the ground because :
(A) the muscles apply force (B) the stone applies force
(C) the earth exerts force (D) the catapult exerts force
ANS : C
96. The SI unit of force
is:
(A) kilogram (B) gram (C) newton (D) none of these
ANS : C
97. A man walking on
the street slips on a banana skin because:
(A) it is sticky (B) his foot crushes it
(C) at that point there is very little friction (D) all of these.
ANS : C
98. between his shoe
and the ground In desert areas, a camel can walk very easily as compared to
horse because it has:
(A) lesser weight (B) broader feet
(C) smaller feet (D) heavier body
ANS : B
99. Force X and Y are applied on an object in opposite directions. If the
magnitude of force Y is more than the X, then the net force acting on the
object .
A) X
- Y is in the direction of Y. B) Y - X is in the direction of Y.
C) X - Y is in the direction of X. D) Y - X is in the direction of X.
ANS : D
100. We can conclude that
force can change the shape of an object by which of the following
examples?
A) Breaking of glass on hammering. B) Squeezing of a toothpaste tube.
C) Stretching of a spring on applying force. D) All the above
ANS : D
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