1. What is the SI unit of acceleration?
A) m/s
B) m/s²
C) km/h
D) cm/s²
Answer: B

2. A car travels 150 km in 3 hours. What is its average speed?
A) 50 km/h
B) 45 km/h
C) 60 km/h
D) 75 km/h
Answer: A

3. If an object is moving with constant velocity, its acceleration is:
A) Positive
B) Negative
C) Zero
D) Changing
Answer: C

4. Which of the following quantities is a scalar?
A) Displacement
B) Velocity
C) Acceleration
D) Speed
Answer: D

5. A projectile is launched with an initial velocity of 20 m/s at an angle of 45° to the horizontal. The horizontal component of its velocity is:
A) 10 m/s
B) 14.14 m/s
C) 20 m/s
D) 17.32 m/s
Answer: B

6. According to Newton’s First Law, an object at rest will stay at rest unless acted upon by a:
A) Constant force
B) Balanced force
C) Net external force
D) Zero force
Answer: C

7. Newton’s Second Law of Motion can be represented by the formula:
A) F = ma
B) F = mv
C) F = m/a
D) F = m/v
Answer: A

8. The force required to accelerate a 5 kg object at 2 m/s² is:
A) 2.5 N
B) 7.5 N
C) 5 N
D) 10 N
Answer: D

9. In the absence of air resistance, all objects fall with the same:
A) Speed
B) Acceleration
C) Force
D) Mass
Answer: B

10. The unit of force in the SI system is:
A) Joule
B) Pascal
C) Newton
D) Watt
Answer: C

11. The work done by a force is zero if the displacement is:
A) Perpendicular to the force
B) In the direction of the force
C) Opposite to the direction of the force
D) Along the force
Answer: A

12. The kinetic energy of a 2 kg mass moving with a speed of 3 m/s is:
A) 3 J
B) 6 J
C) 9 J
D) 18 J
Answer: C

13. Potential energy is given by the formula:
A) PE = mgh
B) PE = 1/2 mv²
C) PE = Fd
D) PE = ma
Answer: A

14. Which of the following is a form of mechanical energy?
A) Kinetic energy
B) Thermal energy
C) Chemical energy
D) Nuclear energy
Answer: A

15. The unit of work in the SI system is:
A) Newton
B) Joule
C) Watt
D) Pascal
Answer: B

16. Momentum is defined as the product of:
A) Mass and velocity
B) Mass and acceleration
C) Force and time
D) Force and distance
Answer: A

17. The SI unit of momentum is:
A) kg·m/s²
B) N·m
C) kg·m/s
D) N·s
Answer: C

18. A 4 kg object moving at 3 m/s collides with a 2 kg object moving at -4 m/s. What is the total momentum before collision?
A) 0 kg·m/s
B) 4 kg·m/s
C) 6 kg·m/s
D) 10 kg·m/s
Answer: A

19. In an elastic collision:
A) Kinetic energy is conserved
B) Momentum is not conserved
C) Both kinetic energy and momentum are conserved
D) Only kinetic energy is not conserved
Answer: C

20. Impulse is the product of:
A) Force and time
B) Mass and velocity
C) Force and distance
D) Mass and acceleration
Answer: A

21. The centripetal force acting on an object moving in a circle is directed:
A) Tangentially to the circle
B) Away from the center of the circle
C) Towards the center of the circle
D) Perpendicular to the motion
Answer: C

22. The time taken to complete one full revolution in a circular path is called:
A) Frequency
B) Period
C) Angular velocity
D) Linear speed
Answer: B

23. The gravitational force between two masses is inversely proportional to the:
A) Sum of the masses
B) Distance between them
C) Square of the distance between them
D) Product of the masses
Answer: C

24. If the distance between two objects is doubled, the gravitational force between them becomes:
A) Four times greater
B) Four times smaller
C) Twice as great
D) Half as great
Answer: B

25. The value of the universal gravitational constant (G) is approximately:
A) 6.67 x 10⁻¹¹ N·m²/kg²
B) 6.67 x 10⁻¹⁰ N·m²/kg²
C) 9.81 m/s²
D) 1.67 x 10⁻²⁷ kg
Answer: A

26. A mass-spring system undergoes simple harmonic motion. The restoring force is proportional to the:
A) Displacement
B) Velocity
C) Acceleration
D) Mass
Answer: A

27. The time period of a simple pendulum depends on:
A) Mass of the bob
B) Length of the string
C) Amplitude of oscillation
D) Acceleration due to gravity
Answer: B, D

28. The frequency of a wave is the:
A) Number of waves passing a point per second
B) Distance between two consecutive crests
C) Maximum displacement from the equilibrium position
D) Time taken for one complete oscillation
Answer: A

29. In a longitudinal wave, the particles of the medium vibrate:
A) Perpendicular to the direction of wave propagation
B) Parallel to the direction of wave propagation
C) In a circular motion
D) At right angles to each other
Answer: B

30. The speed of a wave on a string depends on:
A) Frequency of the wave
B) Wavelength
C) Tension in the string
D) Amplitude
Answer: C

31. The moment of inertia of an object depends on:
A) Mass only
B) Distribution of mass around the axis of rotation
C) Angular velocity
D) Torque applied
Answer: B

32. The unit of angular velocity is:
A) m/s
B) rad/s
C) rad/s²
D) m/s²
Answer: B

33. Torque is the rotational equivalent of:
A) Force
B) Mass
C) Acceleration
D) Energy
Answer: A

34. If a force of 10 N is applied perpendicularly to a lever arm of length 0.5 m, the torque produced is:
A) 2 N·m
B) 5 N·m
C) 10 N·m
D) 0.5 N·m
Answer: A

35. Angular momentum is conserved when:
A) No external torque acts on the system
B) Only internal forces act
C) External forces are balanced
D) Rotational inertia is constant
Answer: A

36. The pressure at a point in a fluid at rest is called:
A) Dynamic pressure
B) Atmospheric pressure
C) Hydrostatic pressure
D) Pascal pressure
Answer: C

37. The SI unit of pressure is:
A) Pascal
B) Bar
C) Torr
D) Newton
Answer: A

38. Bernoulli’s principle is applicable to:
A) Steady flow of incompressible fluids
B) Turbulent flow
C) Compressible fluids
D) Static fluids
Answer: A

39. The buoyant force on an object submerged in a fluid is equal to:
A) The weight of the object
B) The weight of the fluid displaced
C) The volume of the object
D) The density of the object
Answer: B

40. Viscosity is a measure of a fluid’s:
A) Density
B) Incompressibility
C) Resistance to flow
D) Pressure
Answer: C

41. The first law of thermodynamics is a statement of:
A) Conservation of mass
B) Conservation of energy
C) Increase of entropy
D) Absolute zero temperature
Answer: B

42. The internal energy of an ideal gas depends on:
A) Pressure
B) Volume
C) Temperature
D) All of the above
Answer: C

43. The efficiency of a heat engine is given by:
A) (Heat output / Work input) x 100%
B) (Work output / Heat input) x 100%
C) (Heat input / Work output) x 100%
D) (Work input / Heat output) x 100%
Answer: B

44. The second law of thermodynamics introduces the concept of:
A) Energy conservation
B) Entropy
C) Absolute temperature
D) Heat capacity
Answer: B

45. The temperature at which the entropy of a perfect crystal is zero is called:
A) Boiling point
B) Freezing point
C) Absolute zero
D) Curie point
Answer: C

46. The entropy of a system always:
A) Decreases in a spontaneous process
B) Increases in a spontaneous process
C) Remains constant
D) Can be negative
Answer: B

47. The rate of change of velocity is called:
A) Speed
B) Acceleration
C) Momentum
D) Force
Answer: B

48. The law of conservation of momentum states that:
A) Momentum changes if no external force is applied
B) Total momentum of a closed system is constant if no external forces act
C) Momentum is conserved only in elastic collisions
D) Momentum is always conserved in inelastic collisions
Answer: B

49. The period of a simple pendulum depends on:
A) The length of the pendulum
B) The mass of the pendulum bob
C) The amplitude of the swing
D) The density of the pendulum string
Answer: A

50. The power of a machine is defined as:
A) Work done per unit time
B) Force applied per unit distance
C) Energy used per unit time
D) Force multiplied by velocity
Answer: A

51. In a closed system, the total energy remains:
A) Constant
B) Increasing
C) Decreasing
D) Zero
Answer: A

52. The principle of conservation of energy states that:
A) Energy can neither be created nor destroyed
B) Energy can be created from nothing
C) Energy is destroyed in every process
D) Energy changes form but is always lost
Answer: A

53. A body in equilibrium has:
A) Zero acceleration
B) Constant velocity
C) Zero net force
D) All of the above
Answer: D

54. The energy associated with an object due to its position or configuration is called:
A) Kinetic energy
B) Potential energy
C) Thermal energy
D) Mechanical energy
Answer: B

55. A force that acts on an object in the direction of its motion does positive work if:
A) The force is perpendicular to the motion
B) The force is opposite to the direction of motion
C) The force is in the same direction as the motion
D) The force is zero
Answer: C

56. The rate at which work is done or energy is transferred is called:
A) Power
B) Work
C) Force
D) Energy
Answer: A

57. In a vacuum, all objects fall with the same acceleration due to:
A) Air resistance
B) Gravitational force
C) Buoyant force
D) Frictional force
Answer: B

58. The work-energy theorem states that the work done on an object is equal to:
A) The change in its potential energy
B) The change in its kinetic energy
C) The change in its total energy
D) The change in its momentum
Answer: B

59. A simple harmonic oscillator’s displacement-time graph is:
A) Linear
B) Exponential
C) Sinusoidal
D) Parabolic
Answer: C

60. The principle stating that the pressure in a fluid decreases as the velocity of the fluid increases is known as:
A) Pascal’s principle
B) Bernoulli’s principle
C) Archimedes’ principle
D) Newton’s principle
Answer: B

61. The frequency of a wave is the reciprocal of the:
A) Wavelength
B) Speed
C) Amplitude
D) Period
Answer: D

62. The unit of angular momentum is:
A) kg·m²/s
B) N·m
C) J/s
D) kg·m/s
Answer: A

63. The acceleration due to gravity on the surface of the Earth is approximately:
A) 9.8 m/s²
B) 8.9 m/s²
C) 10 m/s²
D) 11.2 m/s²
Answer: A

64. The work done by a force of 5 N moving an object 10 m in the direction of the force is:
A) 50 J
B) 5 J
C) 10 J
D) 100 J
Answer: A

65. The energy of a system is conserved when:
A) It is isolated from its surroundings
B) It is in a state of equilibrium
C) It is undergoing a change of state
D) There is no heat exchange
Answer: A

66. The power output of an engine that does 2000 J of work in 10 seconds is:
A) 200 W
B) 20 W
C) 1000 W
D) 500 W
Answer: A

67. The density of a substance is defined as its mass per unit:
A) Volume
B) Area
C) Time
D) Force
Answer: A

68. The gravitational potential energy of an object is zero at:
A) Its highest point
B) Its lowest point
C) Its midpoint
D) The Earth’s surface
Answer: B

69. The momentum of a body is a vector quantity. It depends on:
A) Mass and velocity
B) Mass and acceleration
C) Force and time
D) Force and distance
Answer: A

70. The centripetal force on an object moving in a circle is provided by:
A) Friction
B) Tension
C) Gravitational force
D) All of the above
Answer: D

71. A 2 kg object moves with a speed of 5 m/s. What is its momentum?
A) 10 kg·m/s
B) 25 kg·m/s
C) 50 kg·m/s
D) 2.5 kg·m/s
Answer: A

72. The impulse experienced by an object is equal to:
A) The change in its momentum
B) The product of mass and velocity
C) The work done on the object
D) The force multiplied by distance
Answer: A

73. The unit of work is also equivalent to:
A) kg·m/s
B) N·m
C) J/s
D) N·s
Answer: B

74. An object moving with uniform velocity has:
A) Constant speed and direction
B) Changing speed
C) Changing direction
D) Increasing acceleration
Answer: A

75. The unit of power is equivalent to:
A) J/s
B) N·m
C) kg·m²/s
D) J·s
Answer: A

76. The pressure exerted by a fluid in a container depends on:
A) The height of the fluid column
B) The volume of the fluid
C) The temperature of the fluid
D) The shape of the container
Answer: A

77. The work done in lifting an object is converted to:
A) Kinetic energy
B) Thermal energy
C) Potential energy
D) Mechanical energy
Answer: C

78. The unit of energy is:
A) Watt
B) Joule
C) Pascal
D) Newton
Answer: B

79. The rate of change of angular momentum is:
A) Torque
B) Force
C) Work
D) Power
Answer: A

80. The coefficient of friction is a measure of:
A) The angle of inclination
B) The resistance to sliding
C) The speed of the object
D) The mass of the object
Answer: B

Classical Mechanics MCQs

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