This is the real Level 1 question set — 20 questions, free, no account needed.
Tap a question to check your answer and read the explanation.
1. A picture frame hangs stationary on a wall in a classroom, supported by a nail. What can be said about the forces acting on the frame?
A. The forces are unbalanced
B. The net force on the frame is zero
C. Only one force acts on the frame
D. The frame is accelerating
Explanation: Since the frame is stationary (in equilibrium), the resultant (net) force acting on it must be zero, meaning the forces (weight and the nail's support force) are balanced.
2. Which of the following physical quantities is a vector quantity?
A. Mass
B. Time
C. Displacement
D. Speed
Explanation: Displacement is a vector quantity because it has both magnitude and direction, unlike mass, time, and speed which are scalar quantities.
3. A body in equilibrium under three forces has a resultant force of ___.
A. maximum value
B. zero
C. half its weight
D. its weight
Explanation: In equilibrium the net (resultant) force is zero.
4. A ball placed on a flat table remains at rest until a boy pushes it. This behaviour of the ball best illustrates which law?
A. Newton's first law of motion
B. Newton's second law of motion
C. Newton's third law of motion
D. Law of conservation of momentum
Explanation: Newton's first law states that a body remains at rest or in uniform motion unless acted upon by an external force. The ball stays at rest until an external force (the push) acts on it.
5. A 10 kg bag of rice is lifted to a height of 5 m above the ground. Calculate its potential energy. (Take g = 10 m/s^2)
A. 50 J
B. 100 J
C. 250 J
D. 500 J
Explanation: Potential energy = mgh = 10 kg x 10 m/s^2 x 5 m = 500 J.
6. The SI unit of work is the ___.
A. newton
B. joule
C. watt
D. pascal
Explanation: Work = force × distance, measured in joules (J).
7. A market woman pushes a wheelbarrow with a constant force of 50 N through a distance of 10 m. How much work is done?
A. 5 J
B. 60 J
C. 500 J
D. 5000 J
Explanation: Work done = force x distance = 50 N x 10 m = 500 J.
8. Calculate the weight of a 5 kg bag of garri. (Take g = 10 m/s^2)
A. 5 N
B. 15 N
C. 50 N
D. 500 N
Explanation: Weight = mass x acceleration due to gravity = 5 kg x 10 m/s^2 = 50 N.
9. When a student jumps off a canoe on the River Niger, the canoe moves backward. This is best explained by which of Newton's laws?
A. First law
B. Second law
C. Third law
D. Law of gravitation
Explanation: Newton's third law states that for every action there is an equal and opposite reaction. As the student pushes on the canoe to jump forward, the canoe is pushed backward.
10. A labourer does 600 J of work in 5 seconds while carrying blocks at a building site. Calculate his power.
A. 60 W
B. 100 W
C. 120 W
D. 3000 W
Explanation: Power = work done/time taken = 600 J / 5 s = 120 W.
11. A ball is thrown horizontally from the top of a tall building. Which of the following statements is correct about its motion, ignoring air resistance?
A. It moves in a straight horizontal line only
B. It moves in a straight vertical line only
C. It follows a curved (parabolic) path
D. It moves at constant speed throughout
Explanation: A projectile launched horizontally undergoes constant horizontal velocity and increasing vertical velocity due to gravity, resulting in a curved parabolic path.
12. A commercial bus travels a distance of 150 m in 10 seconds along the Lagos-Ibadan expressway. Calculate its average speed.
A. 10 m/s
B. 15 m/s
C. 20 m/s
D. 25 m/s
Explanation: Speed = distance/time = 150 m / 10 s = 15 m/s.
13. A force is applied to a 1000 kg car to give it an acceleration of 2 m/s^2. What is the magnitude of the force?
A. 500 N
B. 1000 N
C. 2000 N
D. 5000 N
Explanation: Using F = ma, F = 1000 kg x 2 m/s^2 = 2000 N.
14. A car accelerates uniformly from rest to 20 m/s in 5 s. Its acceleration is ___.
A. 2 m/s²
B. 4 m/s²
C. 5 m/s²
D. 100 m/s²
Explanation: a = (v − u)/t = (20 − 0)/5 = 4 m/s².
15. In a collision between two trucks on the highway, if no external force acts on the system, what happens to the total momentum before and after the collision?
A. It increases
B. It decreases
C. It remains constant
D. It becomes zero
Explanation: The law of conservation of momentum states that in the absence of external forces, the total momentum of a system before collision equals the total momentum after collision.
16. An okada (motorcycle) increases its speed from 5 m/s to 25 m/s in 4 seconds. What is its acceleration?
Explanation: Speed has magnitude only; the others have direction too.
18. A wooden box is dragged across a cemented floor and experiences a resistive force that opposes its motion. What is this resistive force called?
A. Tension
B. Friction
C. Thrust
D. Upthrust
Explanation: Friction is the force that opposes the relative motion between two surfaces in contact, such as a box being dragged across a floor.
19. A stone is dropped from the top of a building and takes 2 seconds to hit the ground. Using g = 10 m/s^2, calculate its velocity just before hitting the ground.
A. 5 m/s
B. 10 m/s
C. 20 m/s
D. 40 m/s
Explanation: For a body falling from rest, v = gt = 10 m/s^2 x 2 s = 20 m/s.
20. Calculate the kinetic energy of a 2 kg football moving with a velocity of 3 m/s.
A. 3 J
B. 6 J
C. 9 J
D. 18 J
Explanation: Kinetic energy = 1/2 x m x v^2 = 0.5 x 2 x 3^2 = 0.5 x 2 x 9 = 9 J.
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