Physics WAEC 2025 Past Questions (Objective & Theory)
Attempt this paper under exam conditions, then mark yourself using the answers.
Section A — Objective
Question 1
The SI unit of energy is the
A. Watt
B. Newton
C. Joule
D. Pascal
Answer: C. Energy (and work) is measured in joules. The watt measures power; the newton measures force; the pascal measures pressure.
Question 2
A body moves with a constant speed of 20 m/s for 5 s. The distance covered is
A. 4 m
B. 25 m
C. 100 m
D. 150 m
Answer: C. Distance = speed × time = 20 × 5 = 100 m.
Question 3
The rate of change of velocity is called
A. Acceleration
B. Speed
C. Momentum
D. Displacement
Answer: A. Acceleration is the rate of change of velocity (a = Δv/t).
Question 4
Which of the following is a vector quantity?
A. Mass
B. Time
C. Energy
D. Force
Answer: D. Force has both magnitude and direction, so it is a vector. Mass, time and energy are scalars.
Question 5
The process by which heat is transferred through a vacuum is
A. Conduction
B. Convection
C. Radiation
D. Evaporation
Answer: C. Radiation transfers heat as electromagnetic waves and needs no medium, so it can travel through a vacuum.
Question 6
A wave has a frequency of 40 Hz and a wavelength of 2 m. Its speed is
A. 20 m/s
B. 80 m/s
C. 42 m/s
D. 160 m/s
Answer: B. v = fλ = 40 × 2 = 80 m/s.
Section B — Theory
Question 1 — Theory
State Newton’s three laws of motion.
Answer:
1. A body remains at rest or in uniform motion in a straight line unless acted upon by an external force. 2. The rate of change of momentum is proportional to the applied force and occurs in its direction (F = ma). 3. For every action there is an equal and opposite reaction.
Question 2 — Theory
A mass of 3 kg is raised through 10 m. Taking g = 10 m/s², calculate the potential energy gained.
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