General Physics I — 2025A Past Questions

University of Ilorin PHY101: 101 questions.

Topics: Kinematics, Conservation Principles in Physics, Vectors and Scalars, Newton's Law of Motion, Units and Dimension, Relative motion, Application of Newtonian Mechanics, Space and Time, Differentiation of Vectors, System of particles, Rotational motion

  1. At what point does a projectile motion have its least velocity?
    1. Right at the point of launch
    2. At the point of touching the ground
    3. At the maximum height
    4. The velocity is the same throughout the motion
  2. Two bodies A and B are moving on the x-axis with velocities of 5 m/s and 20 m/s, respectively. Find the velocity of A with respect to B.
    1. -15 m/s
    2. 15 m/s
    3. 25 m/s
    4. -25 m/s
  3. The unit of pressure is:
    1. Newton
    2. Pascal
    3. Joule
    4. Watt
  4. Space can be defined as:
    1. 2D plane
    2. 3D plane
    3. 4D plane
    4. 5D plane
  5. Newton’s law of motion about the moment of inertia states that:
    1. It depends on mass distribution
    2. It is the resistance to rotational motion
    3. It follows Newton's second law in rotational form
    4. All of the above
  6. Definition of space-time:
    1. A combination of space and time into a single continuum
    2. The concept that time is absolute
    3. The separation of time from space
    4. The fundamental unit of classical mechanics
  7. The dimension of pressure is:
    1. ML⁻¹T⁻²
    2. MLT²
    3. ML⁻¹T⁻¹
    4. ML¹T²
  8. Under reference, does an inertial reference frame rotate? Does Newton’s law hold true?
    1. No, it does not rotate, and Newton’s laws hold
    2. Yes, it rotates, and Newton’s laws hold
    3. Yes, it rotates, and Newton’s laws do not hold
    4. No, it does not rotate, and Newton’s laws do not hold
  9. The law of inertia is which of Newton's laws of motion?
    1. Newton's first law
    2. Newton's second law
    3. Newton's third law
    4. Newton’s fourth law
  10. What is the relative velocity of A with respect to B, given that A has a velocity of 5 m/s and B has a velocity of 20 m/s?
    1. -15 m/s
    2. 15 m/s
    3. 25 m/s
    4. -25 m/s
  11. An object has the least velocity:
    1. At the maximum height
    2. At the base
    3. It is equal at every point in time
    4. It depends on the object's mass
  12. Calculate the acceleration of a system where an 8 kg mass is placed on a frictionless surface and a 6 kg mass is left hanging.
    1. 3.5 m/s²
    2. 4.2 m/s²
    3. 5.0 m/s²
    4. 6.2 m/s²
  13. If p is the momentum of an object, then the expression p²/m has the same units as:
    1. Acceleration
    2. Energy
    3. Force
    4. Impulse
  14. Two 2.0 kg bodies, A and B, collide. The velocities before the collision are: vA = 20i + 30j m/s and vB = 25i -10j m/s. After the collision, vA = 20i + 15j m/s. What is the final velocity of B?
    1. 25i + 5j m/s
    2. 30i - 5j m/s
    3. 25i - 15j m/s
    4. 20i + 10j m/s
  15. If the vector of a moving car is given as (4.0i + 3.0j + 0.1k) km/h, what is the unit vector in its direction?
    1. (0.8i + 0.6j + 0.02k)
    2. (0.7i + 0.7j + 0.1k)
    3. (0.6i + 0.8j + 0.01k)
    4. (0.9i + 0.4j + 0.05k)
  16. Given x = 11t² - 2t³ where x is in meters and t is in seconds, find the velocity when t = 2 s.
    1. 2 m/s
    2. 20 m/s
    3. 22 m/s
    4. 24 m/s
  17. Which of the following is a vector quantity? I. Velocity II. Displacement III. Electric field IV. Electric current V. Electric flux
    1. I only
    2. I and II
    3. I, II, and III
    4. I, II, III, and V
  18. Which of the following laws of motion has inertia?
    1. First law of motion
    2. Second law of motion
    3. Third law of motion
    4. Fourth law of motion
  19. The frame of inertia follows which law?
    1. It accelerates and Newton's first law holds true
    2. It accelerates and Newton's first law does not apply
    3. It does not accelerate and Newton's first law applies
    4. It does not accelerate and Newton's first law does not apply
  20. Two bodies A and B are moving on the x-axis with velocities of 5 m/s and 20 m/s, respectively. Find the velocity of A with respect to B.
    1. 22 m/s
    2. -22 m/s
    3. 15 m/s
    4. -15 m/s
  21. What is the dimension of density?
    1. ML⁻³
    2. ML³T⁻²
    3. ML⁻¹T⁻³
    4. M⁻¹L³T⁻²
  22. Which of the following is related to projectile motion?
    1. Time of flight
    2. Angular velocity
    3. Centripetal acceleration
    4. Terminal velocity
  23. If the kinetic energy and momentum of a system after collision are zero, the collision is said to be:
    1. Elastic
    2. Inelastic
    3. Conserved
    4. Non-conserved
  24. The use of relative motion includes the following except:
    1. Predicting a solar eclipse
    2. Predicting a lunar eclipse
    3. Predicting the coming of a new moon
    4. Calculating rain droplets
  25. The definition of space and time states that time is the interval while space is the difference between two points.
    1. True
    2. False
    3. Partially true - space is relative
    4. Partially true - time is absolute
  26. Which of the following is an example of rectilinear motion?
    1. A pendulum
    2. A stone thrown at an object
    3. A ball rolling on a horizontal surface
    4. The hand of a wall clock ticking
  27. Which of the following is an example of scalar quantities?
    1. Electric current
    2. Speed
    3. Distance
    4. Electric flux
  28. Which of the following statements is not correct?
    1. Momentum is conserved in an elastic collision
    2. Momentum is conserved in an inelastic collision
    3. In an elastic collision, KE_f = KE_i
    4. In an inelastic collision, KE_f = KE_i
  29. What is the dimension of the coefficient of viscosity?
    1. ML⁻¹T⁻¹
    2. ML⁻¹T⁻²
    3. MLT⁻¹
    4. MLT⁻²
  30. Which law of motion describes the concept of inertia?
    1. Newton's first law
    2. Newton's second law
    3. Newton's third law
    4. Newton's fourth law
  31. An object is thrown vertically upward with an initial velocity of 20 m/s. What is the time taken to reach maximum height? (Take g = 10 m/s²)
    1. 1 s
    2. 2 s
    3. 3 s
    4. 4 s
  32. Two objects of mass 3 kg moving in the same direction collide elastically. If the initial velocities are (10i + 20j) and (-6i + 2j), and one of the balls moves (-5i + 10j) after the collision, what is the velocity of the second ball?
    1. (8i + 12j)
    2. (6i + 15j)
    3. (-2i + 5j)
    4. (5i + 10j)
  33. If F = krπλv, where r is the radius, v is the velocity, and k is the coefficient of friction, what is the dimension of λ?
    1. ML⁻¹T⁻¹
    2. ML⁻²T⁻²
    3. MLT⁻¹
    4. MLT⁻²
  34. At which point is the velocity of a projectile the least?
    1. Right after it is projected
    2. It is the same throughout
    3. At the highest point
    4. Before hitting the ground
  35. At a construction site, a nail strikes the ground with a speed of 30 m/s. From which height was it dropped?
    1. 54.00 m
    2. 64.00 m
    3. 55.00 m
    4. 45.00 m
  36. The following are examples of applications of Newtonian mechanics except:
    1. Molecular dynamics
    2. Motion of satellite
    3. Simple harmonic oscillation
    4. Brownian motion
  37. Given Ā = 2i - 3j + 7k and B = 5i + j + 2k, find Ā + B.
    1. 7i - 2j + 9k
    2. 7i - 4j + 10k
    3. 6i - 3j + 8k
    4. 6i - 2j + 9k
  38. Impulse momentum is a result of what?
    1. Force acting over time
    2. Change in displacement
    3. Gravitational pull
    4. Energy conservation
  39. At what angle is the horizontal distance of a projectile maximum?
    1. 45⁰
    2. 90⁰
    3. 60⁰
    4. 0⁰
  40. If m₁ = 4kg and m₂ = 5kg, and the system is on a frictionless surface, what is the acceleration of the 5kg mass? (Take g = 10 m/s²)
    1. 5 m/s²
    2. 10 m/s²
    3. 2 m/s²
    4. 4 m/s²
  41. If vehicle A is moving at 5 m/s and vehicle B is moving at 20 m/s, what is the relative motion of B with respect to A?
    1. 15 m/s
    2. 25 m/s
    3. -15 m/s
    4. -25 m/s
  42. Which of these are vector quantities?
    1. Velocity
    2. Displacement
    3. Electric current
    4. Electric field
  43. Speed is a:
    1. Scalar quantity
    2. Vector quantity
    3. Tensor quantity
    4. Dimensionless quantity
  44. Electric field is a
    1. Scalar quantity
    2. Vector quantity
    3. Tensor quantity
    4. Complex quantity
  45. What is the dimension of wavelength?
    1. L
    2. M
    3. T
    4. ML⁻¹
  46. Best description of particles:
    1. No mass, no size
    2. No mass, but has size
    3. Has mass and size
    4. Has mass, but no size
  47. Two objects of equal mass (3kg) moving at an initial velocity of (3i + 4j) and (5i + 8j), respectively, collide. If the final velocity of the first object is (4i + 7j), calculate the final velocity of the second object.
    1. (4i + 6j)
    2. (5i + 7j)
    3. (6i + 5j)
    4. (7i + 6j)
  48. Two masses (4kg and 6kg) collide. If mass A has an initial velocity of 10 m/s and mass B accelerates at 25 m/s² in 3 seconds after the collision, what was the initial velocity of B?
    1. 20 m/s
    2. 15 m/s
    3. 25 m/s
    4. 30 m/s
  49. If A = 2i - 3j - 7k and B = 5i + j + 3k, find A + B.
    1. 7i - 2j - 4k
    2. 6i - 4j - 3k
    3. 8i - 3j - 5k
    4. 7i - 3j - 4k
  50. A vehicle changes speed from 25 km/hr to 90 km/hr in 5.6 seconds. Find the acceleration.
    1. 2.5 m/s²
    2. 3.2 m/s²
    3. 5.1 m/s²
    4. 6.8 m/s²
  51. A car starts from rest and reaches a final velocity of 318 km/hr after 20 seconds. Calculate acceleration.
    1. 4.42 m/s²
    2. 3.75 m/s²
    3. 5.10 m/s²
    4. 6.25 m/s²
  52. If two 3kg bodies moving in the same direction collide, find the final velocity of B if the initial velocity of A is (10i+20j), the initial velocity of B is (-6i+2j), and the final velocity of A is (-4i+6j).
    1. (3i + 5j)
    2. (4i + 6j)
    3. (2i + 7j)
    4. (-3i + 4j)
  53. If the momentum of a body is multiplied by 2, by what factor is the kinetic energy multiplied?
    1. 2
    2. 4
    3. 8
    4. 16
  54. If a body is thrown upwards with an initial velocity of 20 m/s, calculate the time taken for the object to return to the point where it was thrown (g = 10 m/s²).
    1. 2 s
    2. 3 s
    3. 4 s
    4. 5 s
  55. If two bodies of equal masses collide, and body A has an initial velocity of U while body B is stationary, calculate the ratio of the initial velocity to the final velocity (final velocity = Vf).
    1. 1:1
    2. 1:2
    3. 2:1
    4. 1:3
  56. Which of the following are scalar quantities? I) Speed II) Distance III) Electric field IV) Energy V) Electric flux
    1. I, II, and V
    2. III, IV, and V
    3. I, II, and IV
    4. I, III, and IV
  57. Which of the following is an example of rectilinear motion?
    1. The motion of an object thrown from the top of a building
    2. The motion of a pendulum bob
    3. The motion of an object thrown horizontally on the ground
    4. The motion of a satellite in orbit
  58. What is the angle a projectile has to be launched to attain maximum height?
    1. 0°
    2. 90°
    3. 30°
    4. 45°
  59. If x = 11t² - 2t³ and x is in meters while t is in seconds, find the acceleration at t = 2.
    1. 10 m/s²
    2. 12 m/s²
    3. 14 m/s²
    4. 16 m/s²
  60. When kinetic energy and momentum equal zero in a collision, the collision is:
    1. Conserved
    2. Not conserved
    3. Elastic
    4. Inelastic
  61. Which law describes the relationship between inertia and momentum?
    1. Newton's first law
    2. Newton's second law
    3. Newton's third law
    4. Law of inertia
  62. Which of the following is true about the inertial reference frame?
    1. Not accelerating and Newton's laws do not hold true
    2. Accelerating and Newton's laws hold true
    3. Not accelerating and Newton's laws hold true
    4. Accelerating and Newton's laws hold true
  63. An object A is moving with 5 m/s, and B is moving with 20 m/s in the same direction (positive axis). Find the velocity of B with respect to A.
    1. +25 m/s
    2. -15 m/s
    3. +15 m/s
    4. -25 m/s
  64. The quantities that have units but no dimensions are called:
    1. Complementary units
    2. Dimensionless units
    3. Fundamental units
    4. Supplementary units
  65. Find the impulse of a mass of 400g moving at a speed of 200 cm/s.
    1. 0.8 Ns
    2. 1.2 Ns
    3. 1.5 Ns
    4. 2.0 Ns
  66. Two masses, M₁ = 200g (velocity = 15 m/s) moving east and M₂ = 600g (velocity = 10 m/s) moving west, collide inelastically. Find the final velocity.
    1. 5 m/s east
    2. 6 m/s west
    3. 7 m/s east
    4. 8 m/s west
  67. Given A = 2i - 3j + 7k and B = 5i + j + 2k, find A × B.
    1. (-23i + 29j - 11k)
    2. (23i - 29j + 11k)
    3. (21i - 31j + 9k)
    4. (-21i + 31j - 9k)
  68. What is the dimension for pressure?
    1. ML⁻¹T⁻²
    2. MLT⁻²
    3. MLT²
    4. ML²T²
  69. When is speed at its least in a projectile?
    1. Just as it is launched
    2. Before it lands
    3. Same throughout the motion
    4. Top of its path
  70. If body A and B are moving towards each other with velocity 10 m/s and 12 m/s, what is the velocity of A with respect to B?
    1. 2 m/s
    2. -2 m/s
    3. 22 m/s
    4. -22 m/s
  71. The dot product formula is _____.
    1. A × B = AB sinθ
    2. A · B = AB cosθ
    3. A × B = AB cosθ
    4. A · B = AB sinθ
  72. Which of the following is a combination of derived quantities?
    1. Density, momentum, impulse, and force
    2. Mass, time, current, and temperature
    3. Distance, speed, acceleration, and force
    4. Work, power, velocity, and area
  73. Which of the following are scalar quantities? I) Speed II) Distance III) Electric Field IV) Electric Current V) Electric Flux
    1. I, II, and IV
    2. II, III, and V
    3. I, II, and V
    4. III, IV, and V
  74. Which of the following are applications of relative motion?
    1. Prediction of solar eclipses
    2. Prediction of lunar eclipses
    3. Prediction of raindrops falling
    4. Prediction of when to sight a new moon
  75. A particle A is moving with a speed of 10 m/s towards the right, and another particle B is moving at a speed of 12 m/s towards the left. Find their velocity of approach.
    1. 22 m/s
    2. 2 m/s
    3. -22 m/s
    4. -2 m/s
  76. Which of the following is an example of rectilinear motion?
    1. The movement of the hands of a clock
    2. The motion of a pendulum
    3. The motion of an object thrown vertically upward
    4. The rotation of a wheel
  77. Define space and time.
    1. Space is the three-dimensional extent in which events occur, and time is the continuous progression of existence.
    2. Space and time are the same physical entity.
    3. Space is one-dimensional, and time is two-dimensional.
    4. Time is independent of space in all physical laws.
  78. Given vector A = (2i - 3j + 7k) and B = (5i + j + 2k), find A - B.
    1. -3i - 4j + 5k
    2. -3i - 2j + 5k
    3. 7i - 2j + 9k
    4. 3i + 4j + 5k
  79. A mass of 6 kg is set on a horizontal plane, and another mass of 8 kg is attached to it with a frictionless pulley. Find the acceleration of the 5 kg mass (g = 10 m/s²).
    1. 2 m/s²
    2. 4 m/s²
    3. 6 m/s²
    4. 8 m/s²
  80. A box of 22 kg is dragged on a horizontal plane by a force of 50 N at an angle of 20° to the horizontal. The coefficient of friction is 0.2. Calculate the acceleration of the box.
    1. 0.5 m/s²
    2. 1.2 m/s²
    3. 2.0 m/s²
    4. 3.0 m/s²
  81. A ball was thrown vertically upward with an initial velocity of 20 m/s. How long does it take to reach the maximum height? (Take g = 9.8 m/s²)
    1. 1.5 s
    2. 2.0 s
    3. 2.5 s
    4. 3.0 s
  82. At a construction site, a nail struck the ground with a speed of 30 m/s. Find the height it was dropped from.
    1. 20 m
    2. 30 m
    3. 45 m
    4. 50 m
  83. An automobile changes speed from 25 km/h to 90 km/h in 5.6 s. Find its acceleration.
    1. 3.2 m/s²
    2. 4.5 m/s²
    3. 5.8 m/s²
    4. 6.0 m/s²
  84. Which of Newton’s laws is the law of inertia?
    1. Newton’s First Law
    2. Newton’s Second Law
    3. Newton’s Third Law
    4. Law of Universal Gravitation
  85. What is space-time?
    1. Space-time is a 4-D coordinate system for representing events.
    2. Space-time is a 3-D coordinate system for representing locations.
    3. Space-time is a 4-D coordinate system for representing locations.
    4. Space-time is a 5-D coordinate system for representing events.
  86. A body of mass 0.4 kg is fired with a velocity of 80 m/s into a softwood of mass 4 kg lying on a smooth surface. Find the final velocity of the bullet if the collision is completely inelastic.
    1. 5.3 m/s
    2. 6.4 m/s
    3. 7.2 m/s
    4. 8.0 m/s
  87. If a rigid body with negligible mass has an expression for instantaneous position x = 11t² – 2t³, where x is in meters and t is in seconds, obtain its velocity after 2 seconds.
    1. 44 m/s
    2. 20 m/s
    3. 2 m/s
    4. 72 m/s
  88. The impulse–momentum relationship is a result of:
    1. Newton's first law
    2. Inertia
    3. Newton's second law
    4. Newton's third law
  89. Calculate the tension in a vertical rope pulling a block of mass 60 kg with an acceleration of 2 m/s² (take g = 9.8 m/s²).
    1. 500 N
    2. 600 N
    3. 708 N
    4. 780 N
  90. The property of inertia is dependent on:
    1. Mass
    2. Density
    3. Volume
    4. Temperature
  91. If the linear momentum of a body is doubled due to an applied force, the kinetic energy is:
    1. Eight times
    2. Four times
    3. Doubled
    4. The same
  92. If A and B have velocities of 10 m/s and B moves east while A moves north, what is the relative velocity of A to B?
    1. 14.14 m/s
    2. 1.41 m/s
    3. 10.0 m/s
    4. 5.0 m/s
  93. If body A and B have the same mass and undergo a perfectly inelastic collision, where body A has velocity u₁ and body B was at rest, what is the value of Vf:U₁ after the collision?
    1. 1:2
    2. 2:1
    3. 1:1
    4. 3:1
  94. If an elevator is accelerating upwards with an acceleration of 3 m/s² while a body of mass 40 kg is on its floor, what is the normal reaction force on the body?
    1. 512 N
    2. 312 N
    3. 292 N
    4. 400 N
  95. What is the condition for a reference frame to be inertial?
    1. It must not be accelerating, and Newton's laws must hold true.
    2. It must not be accelerating, and Newton's laws must not hold true.
    3. It must be accelerating, and Newton's laws must hold true.
    4. It must be accelerating, and Newton's laws must not hold true.
  96. Two masses of 8 kg and 6 kg are connected by a string over a frictionless surface, with the 8 kg mass accelerating downward. What is the acceleration of the system?
    1. 2.4 m/s²
    2. 3.2 m/s²
    3. 4.0 m/s²
    4. 5.0 m/s²
  97. A ball was thrown upwards with an initial velocity of 20 m/s. Calculate the time taken for it to return to the point it was thrown from.
    1. 2.0 s
    2. 4.0 s
    3. 6.0 s
    4. 8.0 s
  98. A nail fell from a carpenter's hand and hit the ground with a velocity of 30 m/s. Calculate the height from which the nail fell.
    1. 45.0 m
    2. 56.0 m
    3. 60.0 m
    4. 72.0 m
  99. Which of the following are wholly derived quantities?
    1. Momentum, impulse, energy, pressure
    2. Mass, length, energy
    3. Length, pressure
    4. Velocity, force, time
  100. What type of collision occurs when there is a change in kinetic energy and momentum?
    1. Elastic collision
    2. Inelastic collision
    3. Perfectly inelastic collision
    4. Completely elastic collision

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