General Physics I — 2025B Past Questions

University of Ilorin PHY101: 66 questions.

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

  1. What is the dimension of density?
    1. ML⁻³
    2. ML³T⁻²
    3. ML⁻¹T⁻³
    4. M⁻¹L³T⁻²
  2. Formula for friction where applied force is at an angle
    1. F = μN
    2. F = μ(N + Fsinθ)
    3. F = μ(N - Fsinθ)
    4. F = μ(N + Fcosθ)
  3. A co-ordinate system and a set of physical reference points that uniquely fit and standardize measurement within the frame is called?
    1. Inertial frame
    2. Non-inertial frame
    3. Reference frame
    4. Laboratory frame
  4. Which of the following are purely derived quantities?
    1. Pressure, density, volume
    2. Mass, density, volume
    3. Temperature, volume, area
    4. Time, length, mass
  5. A body of 4kg is moving at 20cm/s, calculate the impulse
    1. 0.4 kgms⁻¹
    2. 4.0 kgms⁻¹
    3. 8.0 kgms⁻¹
    4. 0.8 kgms⁻¹
  6. Force of 50N is applied at 20° to a body of mass 22kg, calculate the acceleration if coefficient of friction is 0.2 (g = 9.8 ms⁻²)
    1. 1.12 ms⁻²
    2. 0.87 ms⁻²
    3. 1.52 ms⁻²
    4. 2.05 ms⁻²
  7. 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
  8. A ball is thrown upward with 20m/s, how long will it take to return back to the ground?
    1. 2s
    2. 4s
    3. 6s
    4. 8s
  9. If linear momentum is doubled due to applied force, the K.E is:
    1. Eight times
    2. Four times
    3. Doubled
    4. The same
  10. If A is travelling at 5m/s East and B at 20m/s East, what is the velocity of A relative to B?
    1. 15 m/s West
    2. 15 m/s East
    3. 25 m/s East
    4. 25 m/s West
  11. Which best describes a particle?
    1. No mass no size
    2. No mass has size
    3. Has mass no size
    4. Has mass and size
  12. For a rigid body with position x = 11t² - 2t³, what is its velocity after 2s?
    1. 44 m/s
    2. 2 m/s
    3. 72 m/s
    4. 20 m/s
  13. A 6kg mass is connected over a frictionless pulley to an 8kg mass. If the 8kg mass moves downward, calculate the tension.
    1. 33.6 N
    2. 44.8 N
    3. 58.8 N
    4. 67.2 N
  14. A butterfly's position is given by x = 0.22t² + 5.5t + 23 and y = 0.17t² + 7.4t + 28. Find its velocity at t=15s.
    1. 12.1 m/s
    2. 15.4 m/s
    3. 18.7 m/s
    4. 21.2 m/s
  15. The velocity of a body changes from 15 km/hr to 90 km/hr in 5.6 sec. Calculate acceleration.
    1. 3.72 ms⁻²
    2. 4.46 ms⁻²
    3. 5.12 ms⁻²
    4. 6.25 ms⁻²
  16. A 1000kg car (20 m/s East) collides with an 8000kg truck (15 m/s East). After collision, the car moves at 10 m/s. Calculate the truck's velocity.
    1. 16.25 m/s East
    2. 18.75 m/s East
    3. 20.50 m/s East
    4. 22.00 m/s East
  17. Which of the following consists wholly of fundamental quantities?
    1. Length, Area, current, time, temp. Charge
    2. Length, velocity, current, time, temp. Charge
    3. Length, current, time, temp. Charge
    4. Length, Area, current, volume, temp. Charge
  18. 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
  19. Which of the following is true of an inertial reference frame?
    1. Accelerating and Newton's law holds true
    2. Not accelerating and Newton's law holds true
    3. Accelerating and Newton's law does not hold true
    4. Not accelerating and Newton's law does not hold true
  20. Given A=2i-3j+7k, B=5i-j-2k. Find A-B
    1. -3i -2j +9k
    2. 3i +2j -9k
    3. -3i -4j +5k
    4. 7i -4j +5k
  21. Two 3kg masses, one with velocity 10i+4j and another with 6i-5j, collide. After collision, one moves at 5i-10j. Calculate the final velocity of the other mass.
    1. 11i +11j
    2. 9i +9j
    3. 15i -3j
    4. 6i +7j
  22. 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
  23. A 200kg body (15m/s) collides with a 600kg body (10m/s opposite direction). What is their common velocity if the collision is inelastic?
    1. 3.75 m/s
    2. 5.25 m/s
    3. 6.50 m/s
    4. 7.80 m/s
  24. A rope moves a 60kg mass upward with 2m/s² acceleration. Find the tension.
    1. 588 N
    2. 648 N
    3. 708 N
    4. 768 N
  25. Two particles start from the same point, one north at 10m/s and the other east at 10m/s. Calculate their relative velocity.
    1. 10√2 m/s northwest
    2. 10√2 m/s southeast
    3. 14.14 m/s northeast
    4. 14.14 m/s southwest
  26. A body starts from rest and reaches 40m/s in 25s. Find acceleration.
    1. 1.6 m/s²
    2. 2.0 m/s²
    3. 2.4 m/s²
    4. 3.0 m/s²
  27. A 400g mass moves at 200cm/s. Find momentum.
    1. 0.08 kgm/s
    2. 0.8 kgm/s
    3. 8 kgm/s
    4. 80 kgm/s
  28. Object A moves at 5m/s and B at 20m/s (same direction). Find velocity of B relative to A.
    1. 15 m/s forward
    2. 15 m/s backward
    3. 25 m/s forward
    4. 25 m/s backward
  29. At what point does a projectile have its least velocity?
    1. At launch
    2. At landing
    3. At maximum height
    4. Same throughout
  30. Newton’s law about moment of inertia states that:
    1. Depends on mass distribution
    2. Resistance to rotational motion
    3. Follows Newton's second law rotationally
    4. All of the above
  31. An object has least velocity:
    1. At maximum height
    2. At base
    3. Equal at all points
    4. Depends on mass
  32. Two 2kg bodies collide with vA = 20i+30j, vB = 25i-10j. After collision, vA = 20i+15j. Find final vB.
    1. 25i +5j
    2. 30i -5j
    3. 25i -15j
    4. 20i +10j
  33. For a car's velocity vector (4.0i + 3.0j + 0.1k) km/h, what is the unit vector?
    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)
  34. A collision with a stationary object is called:
    1. Elastic collision
    2. Inelastic collision
    3. Perfectly inelastic collision
    4. Completely elastic collision
  35. The frame of inertia follows which law?
    1. Accelerates and Newton's first law holds
    2. Accelerates and Newton's first law doesn't apply
    3. Doesn't accelerate and Newton's first law applies
    4. Doesn't accelerate and Newton's first law doesn't apply
  36. Which relates to projectile motion?
    1. Time of flight
    2. Angular velocity
    3. Centripetal acceleration
    4. Terminal velocity
  37. If post-collision kinetic energy and momentum are zero, the collision is:
    1. Elastic
    2. Inelastic
    3. Conserved
    4. Non-conserved
  38. Example of rectilinear motion is:
    1. Pendulum
    2. Stone thrown at an object
    3. Ball rolling horizontally
    4. Clock hand ticking
  39. Which statement is incorrect about collisions?
    1. Momentum conserved in elastic collision
    2. Momentum conserved in inelastic collision
    3. In elastic collision, KE_final = KE_initial
    4. In inelastic collision, KE_final = KE_initial
  40. What is the dimension of coefficient of viscosity?
    1. ML⁻¹T⁻¹
    2. ML⁻¹T⁻²
    3. MLT⁻¹
    4. MLT⁻²
  41. If F = krπλv, where r is radius, v is velocity, and k is coefficient of friction, what is the dimension of λ?
    1. ML⁻¹T⁻¹
    2. ML⁻²T⁻²
    3. MLT⁻¹
    4. MLT⁻²
  42. A nail strikes the ground at 30 m/s. From what height was it dropped?
    1. 54.00 m
    2. 64.00 m
    3. 55.00 m
    4. 45.00 m
  43. 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
  44. Impulse momentum is a result of what?
    1. Force acting over time
    2. Change in displacement
    3. Gravitational pull
    4. Energy conservation
  45. At what angle is horizontal distance of a projectile maximum?
    1. 45°
    2. 90°
    3. 60°
    4. 0°
  46. If vehicle A moves at 5 m/s and B at 20 m/s, what is B's velocity relative to A?
    1. -15 m/s
    2. 25 m/s
    3. 15 m/s
    4. -25 m/s
  47. Which is NOT usually a vector quantity?
    1. Velocity
    2. Displacement
    3. Electric current
    4. Electric field
  48. What is the dimension of wavelength?
    1. T
    2. M
    3. L
    4. ML⁻¹
  49. The unit of pressure is:
    1. Newton
    2. Pascal
    3. Joule
    4. Watt
  50. 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
  51. A vehicle changes speed from 25 km/hr to 90 km/hr in 5.6 seconds. Find acceleration.
    1. 2.5 m/s²
    2. 3.2 m/s²
    3. 5.1 m/s²
    4. 6.8 m/s²
  52. Which 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
  53. What angle maximizes projectile height?
    1. 0°
    2. 90°
    3. 30°
    4. 45°
  54. Quantities with units but no dimensions are called:
    1. Complementary units
    2. Dimensionless units
    3. Fundamental units
    4. Supplementary units
  55. Two masses M₁=200g (15 m/s east) and M₂=600g (10 m/s west) collide inelastically. Find final velocity.
    1. 5 m/s east
    2. 6 m/s west
    3. 7 m/s east
    4. 8 m/s west
  56. Given A = 2i - 3j + 7k and B = 5i + j + 2k, find A × B.
    1. (23i + 29j - 11k)
    2. (-13i - 31j + 17k)
    3. (21i - 31j + 9k)
    4. (-21i + 31j - 9k)
  57. A 0.4kg bullet (80 m/s) embeds in 4kg softwood on smooth surface. Find final velocity in completely inelastic collision.
    1. 5.3 m/s
    2. 6.4 m/s
    3. 7.2 m/s
    4. 8.0 m/s
  58. Calculate tension in a rope pulling 60kg upward at 2m/s² (g=9.8 m/s²).
    1. 500 N
    2. 600 N
    3. 708 N
    4. 780 N
  59. If A and B have velocities of 10 m/s, with B moving east and A moving 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
  60. 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
  61. If an elevator is accelerating upwards at 3 m/s² with a 40 kg mass on its floor, what is the normal reaction force?
    1. 512 N
    2. 312 N
    3. 292 N
    4. 400 N
  62. 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.
  63. Two bodies A (5 m/s) and B (20 m/s) move on the x-axis. Find the velocity of A relative to B.
    1. 15 m/s
    2. -15 m/s
    3. 25 m/s
    4. -25 m/s
  64. Two 3kg masses with initial velocities (3i + 4j) and (5i + 8j) collide. If the first object's final velocity is (4i + 7j), find the second object's final velocity.
    1. (4i + 7j)
    2. (5i + 7j)
    3. (6i + 5j)
    4. (4i + 5j)
  65. Particle A (10 m/s right) and B (12 m/s left) approach each other. Find their velocity of approach.
    1. -22 m/s
    2. 2 m/s
    3. -2 m/s
    4. 22 m/s
  66. Define space and time.
    1. Space and time are the same physical entity.
    2. Space is the three-dimensional extent where events occur, and time is the continuous progression of existence.
    3. Space is one-dimensional, and time is two-dimensional.
    4. Time is independent of space in all physical laws.

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