Class 9 Science: Force and Laws of Motion Worksheet (with Answers)
A free, print-ready worksheet on Force and Laws of Motion for CBSE Class 9 Science, with a matching answer key. Use the sample below, or build your own with the exact mix of questions you need — no login, no ads.
Sample worksheet
7 of 19 questions from this chapter. Generate your own for the full set, more variations, and a clean print layout.
- 1. The tendency of a body to resist change in its motion is:
- (a) momentum
- (b) acceleration
- (c) inertia
- (d) force
- 2. The SI unit of force is the:
- (a) newton
- (b) pascal
- (c) watt
- (d) joule
- 3. Newton's second law gives the relation:
- (a) F = ma
- (b) F = m/a
- (c) F = mv
- (d) p = mv
- 4. A 20 N force on a 4 kg mass gives an acceleration of:
- (a) 80 m/s²
- (b) 5 m/s²
- (c) 0.2 m/s²
- (d) 16 m/s²
- 5. State Newton's first law of motion.
- 6. Why are seat belts important in cars?
- 7. State and explain the law of conservation of momentum with an example.
View answers
- 1. (c) inertia — This tendency is inertia.
- 2. (a) newton — Force is measured in newtons (N).
- 3. (a) F = ma — F = ma comes from the second law.
- 4. (b) 5 m/s² — a = F/m = 20/4 = 5 m/s².
- 5. A body remains at rest or in uniform motion unless acted on by an unbalanced external force.
- 6. They prevent the body's inertia from throwing it forward during a sudden stop, reducing injury.
- 7. When no external force acts on a system, its total momentum stays constant. For two colliding bodies: m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂. Example: when a bullet is fired, the forward momentum of the bullet equals the backward momentum of the gun, so the gun recoils — the total momentum before and after firing is zero.
How it works
Every question is drawn from StudyMatic’s own Science bank for Force and Laws of Motion — nothing is auto-generated or invented. Pick how many of each type you want, add your own questions if you like, choose 1–4 paper sets for anti-cheating, and print the worksheet and answer key separately or save them as PDF.
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FAQ
- Is this Class 9 Science worksheet on Force and Laws of Motion free?
- Yes — it is completely free, with no login and no ads. You can print it or save it as a PDF, and generate unlimited variations.
- Does the Force and Laws of Motion worksheet come with answers?
- Yes. Every worksheet has a separate answer key with the correct answers, short explanations and marks, so it is ready for marking.
- Can I choose how many questions and which types?
- Yes. Open the generator for this chapter and set how many MCQs, short, long and HOTS questions you want; totals and marks update live, and you can swap any single question.
- Which board and class is this for?
- This worksheet is aligned to CBSE Class 9 Science, chapter “Force and Laws of Motion”.