Practise 30 real Federal Board questions on Dynamics from 2023 to 2026. See the answer and explanation as soon as you answer.
Dynamics is one of the 16 main chapters in our Federal Board Matric Physics question bank (9th class), and about 8% of its real questions come from it. Tayyari Karo has 30 real questions on this chapter from 2023 to 2026; 10 are multiple choice and marked instantly, and the rest are short and long questions with a model answer. By difficulty: 18 easy, 12 medium.
Work through the questions below, then open the explanation for each one. Redo the ones you missed a few days later.
These are real past-paper questions. Think of your answer first, then open the explanation.
Which fundamental force is the strongest of all?
Answer: C. Strong force
The strong nuclear force, which binds nucleons, is the strongest fundamental force; gravity is the weakest.
Why does a heavy object resist change in its motion?
Answer: A. It has greater inertia
Inertia depends on mass; a heavier object has more inertia.
If F = 25 N and x = 2.5 m then spring constant 'k' will be:
Answer: D. 10 Nm⁻¹
k = F/x = 25/2.5 = 10 N m⁻¹.
According to Newton's second law of motion:
Answer: C. a ∝ F
Acceleration is directly proportional to the net force (and inversely to mass).
Which of the following is a non‑contact force?
Answer: D. Magnetic force
Magnetic (like gravitational and electric) force acts at a distance without physical contact.
If the velocity of the body becomes double, then centripetal force will be:
Answer: C. Four times
Fc = mv²/r. Doubling v makes v² four times, so Fc becomes four times.
State the relationship between force and extension for a spring according to Hooke's Law.
Hooke's law: within the elastic limit, the extension of a spring is directly proportional to the applied force: F ∝ x ⇒ F = kx, where k is the spring constant (N m⁻¹), a measure of the spring's stiffness. Doubling the force doubles the extension. Beyond the elastic limit the spring is permanently stretched and the law no longer holds.
What is meant by force? State its SI unit.
Force is an agent that changes or tends to change the state of rest or of uniform motion of a body; it can also change the shape or size of a body. It is a vector quantity: F = ma.
SI unit: newton (N); 1 N = 1 kg m s⁻² — the force that gives a mass of 1 kg an acceleration of 1 m s⁻².
| Session | Questions |
|---|---|
| 2026 Annual | 6 |
| 2025 1st Annual | 7 |
| 2025 2nd Annual | 8 |
| 2024 Annual | 5 |
| 2023 Annual | 4 |
30 real Federal Board (FBISE) Physics questions on Dynamics from 2023 to 2026, for 9th class. Each one shows the session it came from.
No. We could not find an official FBISE marking scheme for these papers, so the answers and explanations are written by Tayyari Karo for practice. Check anything important with your teacher or textbook.
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