AP 9th Physical Science Mock Test 2023 for Chapter-3 "Laws Of Motion" Online Practice Test

1. Internal forces

Are never balanced forces

Are always balanced forces

May or may not be balanced

Are difficult to be decided

2. External forces

Are never balanced forces

Are always balanced forces

May or may not be balanced

Are difficult to be decided

3. Momentum gives a measure of

Mass of body

Velocity of body

Quantity of motion

Weight of body

4. Product of mass and acceleration measure

Velocity

Force

Momentum

Impulse

5. SI unit of force is

Newton

Kg.wt

Dyne

Kg/ms

6. N/kg is a unit of

Velocity

Acceleration

Momentum

Impulse

7. The rate of change of momentum w.r.t time is measured in

Kg m/s

Kg m

Kg m/s²

8. Kg m/s² is the SI unit of

Force

Speed

Momentum

Inertia

9. A gun recoils after firing. The reason explained by

Conversion of energy

Newton's 3^rd law of motion

Newton's 2^nd law of motion

All

10. A jet engine or a rocket works on the principle of

Conservation of momentum

Conservation of mass

Newton's 3^rd law of motion

Conservation of motion

11. A ball of mass 'm' moves perpendicularly to a wall with a speed 'v' strikes it and rebounds with the same speed , then the change in momentum is

2 mv

1/2 mv

12. The force that always opposes motion of objects

Friction

Repulsive force

Cohesive force

Gravitational force

13. An iron-ball moving with a in initial velocity 'u' changes its velocity to 'v' in time t sec , if the mass of a ball is 'm' kg the force acting on it F =

$\frac{m(v-u)}{t}$

$\frac{m(v+u)}{t}$

$\frac{t(v+u)}{m}$

$\frac{(v-u)t}{m}$

14. Mass in motion as described by Newton is

Energy

Pressure

Momentum

Friction

15. In an isolated system the total ................. is conserved

Force

Momentum

Velocity

Acceleration

16. A non zero net force acting on a body disturbs the state of

Motion

Rest

Equilibrium

Momentum

17. ....... is a property of matter that resist changes in its state of rest of motion

Momentum

Mass

Size

Inertia

18. The product of net force and interaction time is called ................. of net force

Reaction force

Impulse

Acceleration

Equilibrium

19. Identify the correct statement regarding Aristotle's belief

Any body which is at rest naturally starts moving

A body continues its state of rest or uniform motion unless a net force acts on it

Any moving body continues in the state only until some external force on it

Any moving body naturally comes to rest

20. Rate of change of momentum is proportional to

Net force

Net speed

Motion

Pressure

21. The product of mass and velocity is called

Force

Momentum

Impulse

Acceleration

22. When we drop an egg on the concrete floor it will break because

Smaller force acts on the egg for longer time

Larger force acts on the egg for longer time

Smaller force acts on the egg for shorter time

Larger force acts on the egg for shorter time

23. A: Action reaction pair in Newton's third law always represents forces acting on two bodies simultaneously
B: Newton's first and second laws of motion apply to a single body

A is true and B is false

A is false and B is true

A , B are true

A , B are false

24. Assertion (A) : Pace bowler Bumrah runs in from a long distance before he bowls
Reason (R) : To acquire dynamic inertia

A is correct , R is false

A is false , R is true

A , R are false

A , R are true but R not correct explanation of A

25. An unbalanced force causes a change in................ of an object

Speed

Direction of motion

Mass

Speed & Direction of motion

26. As the boatman jumps in forward directions , the boat moves

To his left

Backwards

To his right

May move in any direction

27. A passenger in a moving train tosses a coin which falls infront of him means that the motion is

Accelerated

Retarded

Uniform

Circular motion

28. take a block of ice and place it on a smooth surface , push the block with some net force . Now increase net force and push it again . the outcome of the experiment is

Smaller the net force smaller the acceleration

Larger the net force larger the acceleration

Larger the net force smaller the acceleration

Smaller the net force larger the acceleration

29. Make a stack of carrom cons on the carrom board . Give a sharp hit at the bottom of the stack with the striker , the law which represent the above experiment is

Newton's third law of motion

Newton's fourth law of motion

Newton's first law of motion

Newton's second law of motion

30. One of the following is not a force

Air resistance

Muscular force

Inertial

Friction

31. If F_net = 0 , then velocity of the object is

Constant

Non uniform

0 or constant

32. The measurement of inertia of an object is

Mass

Force

Size

All

33. Physical quantity for force

Kg ms^-2

Kg ms^-1

Kg ms²

Kg ms

34. Physical quantity for momentum

Kg ms

Kg ms²

Kg ms¹

Kg ms^-1

35. Physical quantity of impulse is given by

Kg ms^-2

Kg ms²

Kg ms^-1

Kg ms¹

36. SI unit of momentum

Kg ms^-1

Kg ms¹

Kg ms^-2

Kg ms²

37. SI unit for force

Kg ms^-2

Newton

Ohm

Resistance

38. $\Delta p$ =

F_net $\times \Delta t$

F_net $\times \Delta v$

F_force $\times \Delta t$

None

39. One newton is equal to the

F_net $\times \Delta t$

$\frac{1 kg}{m s^{-1} }$

Kg ms

None

40. Inertia is a property of matter that resists changes in its state of motion or rest . it depends on the mass of the object
From the above statement , arrange the following animals in increasing order of inertia
a. elephant , b. lion , c. dog , d.rat

b , a , c , d

c , d , b , a

a , b , c , d

d , c , b , a

41. A rocket moves in an empty space at a speed of 6 km/s . the speed of bolt separated from the rocket is

-6 km/s

6 km/s

Can't say

0 km/s

42. A suitcase kept in a moving bus moves forward when the bus

Comes to rest

Moves forward

Taken turn

At rest

43. Safe way to catch the fast moving cricket ball is , while catching

Keeps the hand steady

Pull the hands back

Push the hands towards the ball

None

44. A passenger in a moving train tosses a coin which falls behind him , it means the motion of the train is

Retarded

Circulation motion

Accelerated

Uniform

45. When 2.5 kg of hero's hand hits the villain of 80 kg who is at rest , the villain moves with 12.5 ms^-1 and hits the transformer near by . What will be the speed of hero's hand compared to the bullet fired from the gun ?

Very less than bullet speed

Greater than bullet speed

Less than bullet speed

46. All the bodies have the same inertia

Yes

May be

Depend on object

47. ..................... is the force which opposes the relative motion between two objects which are in contact

Force

Friction

Acceleration

Impulse

48. A and B are two bodies .A exerts a force on B by F due north , what is the force on A by B ?

The force on A by B is F due north

The force on A by B is F due south

The force on A by B is F due east

The force on A by B is F due west

49. The symbol for linear momentum is

50. 'J' is symbol for

Impulse

Force

Mass

Friction

51. Choose the correct matching for the following

SI unit of momentum ( ) a)1 kg/ms^-2
SI unit of force ( ) b) $F_{net} \times \Delta t$
$\Delta p$ =..... ( ) c)kg ms^-1
One Newton ( ) d)Newton

1 - c ,2 - d ,3 - b ,4 - a

1 - c ,2 - b ,3 - d ,4 - a

1 - a ,2 - d ,3 - c ,4 - b

1 - a ,2 - b ,3 - c ,4 - d

52. Match the physical quantities given in set - A with proper units in Set - B.

Set - A Set - B

Force ( ) x) kg ms²
Momentum ( ) y) kg ms^-2
Impulse ( ) z) kg ms^-1

1 - y , 2 - z , 3 - x

1 - z , 2 - x , 3 - y

1 - x , 2 - y , 3 - z

1 - x , 2 - z , 3 - y

53. Which of the following represents correct diagram of atwood machine ?

54. The following shows

Before collision

During collision

After collision

Conservation of momentum

55. What does the following indicates ?

Smaller force acts on the egg for longer time

Larger force acts on the egg for longer time

Smaller force acts on the egg for shorter time

Larger force acts on the egg for shorter time

56. The materials required for following experiment is

Test tube

Rubber cork

String

All

57. Newtons first law explains about

Acton and reaction

Linear momentum

Conservation of momentum

What happens to an object when no net force acts on it

58. p = mv , here m means

Momentum

Mass

Velocity

Speed

59. The body which is in motion always tries to move in same direction until some force act on it , this property is known as

Linear momentum

Conservation of energy

Dynamic inertia

Newtons 3rd law

60. Sate the following

Different forces applied on same object

Same forces act on different objects

Different forces act on different objects

Same forces acts on same objects

61. A : A truck moves with a certain speed and collides a wall and comes to rest
B : A truck moves with a certain speed and collides a heap of grass and comes to rest
In which situation lorry damaged more?

In A situation

In B situation

In both situations

No damage

62. Symbol for newton

63. Match the following

Newton ( ) a.P
Mass ( ) b.N
Momentum( ) c.M

1-a , 2-b , 3-c

1-b , 2-c , 3-a

1-c , 2-b , 3-a

1-b , 2-a , 3-c

64. ................. is the string always acts away from the body to which it is attached

Impulse

Tension

Linear momentum

Friction

65. A: F_net = $\frac{ \Delta p}{ \Delta t}$
B: F_net = ma

A correct , B wrong

A wrong , B true

A is universal formula and B is Constant mass

B is universal formula and A is Constant mass

66. A system is said to be isolated system when

F_net = 0

F_net > 0

F_net < 0

F_net $\neq$ 0

67. What does the following ?

Newtons 1st law

Newtons 2nd law

Newtons 3rd law

All

68. Newton proposed 3 fundamentals laws which explain the connection between force and change in motion .These 3 laws are known as

Newtons laws of motion

Laws of motion

Both are same

None

69. Inertia depends on ....... object

Momentum

Mass

Velocity

Acceleration

70. In which property of matter that resists changes in its state of motion or rest ?

Impulse

Newton

Inertia

Mass

71. Linear momentum of body is product of the

Mass and Velocity

Mass and acceleration

Velocity and acceleration

Impulse and inertia

72. Linear momentum of body is product of the

Mass and Velocity

Mass and acceleration

Velocity and acceleration

Impulse and inertia

73. SI unit for P is

Kg.ms^-1

Kg.ms^-2

Kg.ms^-4

None

74. Momentum has CGS unit is

g.cms^-1

g.cms^-2

g.cms¹

None

75. In the absence of net external force on the system , the momentum of the system remains unchanged this is called

Conservation of momentum

Impulsive force

Inertia of rest

None

76. The impulse of force is equal to the change in ............................... that an object experiences during an interaction

Velocity

Momentum

Acceleration

Mass

77. Impulse is a

Vector quantity

Scalar quantity

No quantity

May be scalar or vector

78. CGS unit for impulse

Dyne second

gcm s^-1

Both

79. Forces exerted over a limited time are called

Impulsive force

Inertia of rest

Inertia of motion

Newton

80. ........... is the tendency of a body to continue in its state of rest

Inertia of rest

Impulsive force

Newton

None

81. ........... is the tendency of a body to continue in its state of uniform motion in a straight line

Inertia of rest

Impulsive force

Inertia of direction

Inertia of motion

82. The inability of a body to continue in its state of uniform motion in straight line is

Inertia of motion

Inertia of direction

Inertia of rest

Impulse

83. Two people push the car for 3s with a combined net force of 200 N , then the impulse provided for car is

300 Ns

400 Ns

500 Ns

600 Ns

84. What is the momentum of a 6.0 kg bowling ball with a velocity of 2.2 m/s ?

13.2 ms

13.2 Kgms^-1

13.2 gms^-1

None

85. The objects have masses 8 kg , 25 kg and 50 kg respectively then which one has more inertia ?

8 kg

25 kg

50 kg

All are same

86. When a carpet is beaten with a stick , dust comes out of it due to

Inertia of direction

Inertia of motion

Inertia of rest

All

87. A passenger in moving train tosses a coin which falls behind him.It means that the motion of the train is

Accelerated

Uniform

Retarded

Circular motion

88. What force is required to produce an acceleration of 3m/s² in an object of mass 0.7 kg ?

2.0 N

2.1 N

2.2 N

3.0 N

89. CGS unit for force is

Dyne - second

Dyne

Grams

Joule

90. A : Mass is scalar quantity
B : Force is vector quantity

A is true , B is false

A is false , B is true

A , B are true

A , B are false

91. Choose the true option

Mass ( ) a. Newton-second
Linear momentum ( ) b. Kilogram
Force ( ) c. N-s
Impulse ( ) d. Newton

1-b , 2-c , 3-d , 4-a

1-b , 2-c , 3-a , 4-d

1-d , 2-c , 3-b , 4-a

1-a , 2-b , 3-c , 4-d

92. Match the correct symbol

Impulse ( ) a. F
Force ( ) b. J
Mass ( ) c. p
Linear momentum( ) d. m

1-a , 2-b , 3-c , 4-d

1-c , 2-a , 3-d , 4-b

1-b , 2-c , 3-d , 4-a

1-b , 2-a , 3-d , 4-c

93. What is the velocity of a small object that has separated from the rocket moving in free space with velocity 10 km/s ?

9 km/s

10 km/s

11 km/s

8 km/s

94. The force exerted by the earth on the ball is 8N . What is the force on the earth by he ball ?

95. The following is example for

Newtons first law of motion

Newtons second law of motion

Newtons third law of motion

None

96. It is

Force applied in same direction

Action and reaction forces

Linear momentum

All

97. The following is used to show the

Newtons first law

Newtons second law

Newtons third law

All

98. Which of the following are not example for Newton's first law of motion ?

Pushing wooden boxes with same force

Hitting the stock of coins with a striker

Fast pulling of paper hoop kept on a bottle

Motion of rocket

99. Which of the following are not Newton's second law of motion ?

Hitting carroms by striker

Pushing wooden boxes with same force

Both

Motion of rocket

100. It follow the

Newton first law of motion

Newtons second law of motion

Both

Newtons third law of motion

AP 9th Physical Science Mock Test 2023 for Chapter-3 “Laws Of Motion” Online Practice Test

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