Grade 9 Physics Conceptual Questions & Numericals | Second Annual 2025

Second Annual Exam Prep

Grade 9 Physics — Conceptual Questions & Numericals

Complete set of conceptual & numerical exam-prep questions for revision.

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Chapter 01

Physical Quantities and Measurement

1. Which characteristics are found common in physical quantities? Explain with example.
2. Write any three advantages of using SI units.
3. Which base quantities are involved in the following derived quantities?
   (a) Force   (b) Work   (c) Pressure
4. How prefix micro is 1000 times greater than prefix nano?
5. How scalars can be added, subtracted and multiplied? Give example.
6. Why vectors cannot be added, subtracted and multiplied like scalars?
7. Explain how measuring cylinder can be used to measure the volume of irregular shaped solid object?
8. Differentiate b/w mechanical and digital stopwatch.
9. Differentiate b/w systematic and random error.
10. Differentiate b/w precision and accuracy.
11. How random errors can be reduced?

Prefixes — Numericals

Practice Set

Solve the selected numericals from the textbook (No. 2, 4, 5 etc.).

Chapter 02

Kinematics

1. Can a body be at rest and in motion at same time? Explain.
2. Give two situations in which a body covers some distance but displacement is zero.
3. Differentiate b/w speed and velocity.
4. If we drop a piece of paper and a coin, which of them will hit the ground first?
5. Write the equations of motion for freely falling bodies.
6. Write the equations of motion for bodies at rest.
7. Numericals: Solve Q. No. 2, 4, 5.

Chapter 03

Dynamics — I

1. Differentiate b/w Electromagnetic and Gravitational force.
2. Why newton's first law of motion is called the law of inertia?
3. What happens when a bus takes a sharp turn?
4. Why it is difficult to push a large man on a swing as compared to a small child?
5. Why do we feel a push to back when a bus starts moving?
6. State and derive the newton's second law of motion.
7. Explain why newton's laws are not applied on high speed objects?
8. Differentiate b/w mass and weight.
9. State and prove newton's second law of motion in terms of momentum.
10. Explain and derive the relation for law of conservation of momentum for two objects colliding with each other.
11. When a gun is fired it recoils, why?
12. Explain how space shuttles accelerate in space?
13. Does mass change with change in altitude?

Chapter 04

Dynamics — II

1. Why it is easier to open or close the door by applying force at the outer edge rather than near the hinge?
2. How bottle opener helps to open soda bottles easily?
3. Why it is easier to loosen a rusty nut with a long spanner as compared to a short one?
4. Why door knobs are fixed at the outer edge of the door?
5. Describe the following terms: (a) Moment arm (b) Line of action of force (c) Axis of rotation
6. How we can calculate the center of gravity of irregular shaped cardboard?
7. Is there any difference between center of mass and center of gravity?
8. Why there is a need for second condition of equilibrium if a body satisfies first condition of equilibrium?
9. How the stability of objects can be improved?
10. Why vehicles are made heavy at their bottom?
11. Briefly explain the methods of reducing friction?
12. Explain why rolling friction is less than sliding friction.
13. What is the purpose of tread marks of the tyres of vehicles. Do they provide extra friction?
14. Explain how banking avoids the accidents during turn?
15. Explain how the dryer of washing machine works?
16. How calculation of average velocity of different orbits can be useful?
17. Explain how GPS is used to locate the object anywhere on earth.
18. What do you know about geostationary satellites?
19. Why geostationary satellites are stationary with the earth?

Chapter 05

Pressure and Deformation in Solids

1. Why dams are made thick at their bottom and thin at the top?
2. Why does a balloon pop easily with a pin but not with our hands?
3. Why does a blunt knife cannot cut meat easily?
4. Explain how a suction cup gets its sticking force?
5. How mercury barometer is used to indicate the weather condition?
6. How atmospheric pressure vary with altitude?
7. Is it possible to drink water with straw on moon? Explain.
8. Why it is difficult to cook food at high altitudes?
9. Show by a simple experiment that pressure in liquid increases with depth.

Chapter 07

Density and Temperature

1. Which state of matter has more density and why?
2. What do you know about displacement method?
3. Why plasma is often called the fourth state of matter?
4. Why are auroras usually seen near the polar regions and not near the equator?
5. What does absolute zero represent in different scales?
6. Why mercury is preferred to be used as thermometeric liquid?
7. Why the temperature does not increases further if a body reaches its melting point?

Chapter 08

Magnetism

1. How the direction of magnetic field can be found on a current carrying conductor?
2. How we can find the direction of magnetic field at any point?
3. Why magnetic shielding is important?
4. Differentiate b/w hard and soft magnetic materials.
5. Differentiate b/w temperory and permanent magnets.
6. Does parmanent magnets requires electric current to attain magnetisation?
7. Explain when a solenoid act as a bar magnet?
8. Explain how birds use earth's magnetic field for navigation?

Chapter 09

Nature of Science and Physics

1. Describe the role of physics in technology.
2. Differ theory from a law.
3. What helps the birds to stay warm in winter?
4. How do airplanes find their way towards their destination?