10th Science Physics Unit 1 Important Questions

Build a flawless foundation for your science curriculum by mastering the 10th Science Physics Unit 1 Important Questions. The Laws of Motion chapter is highly critical, featuring foundational concepts like inertia, Newton’s laws of motion, the law of conservation of linear momentum, and universal gravitational mechanics. This carefully curated list highlights the most frequently asked 2-mark definitions, 4-mark explanations, and high-yielding numerical problems, ensuring you understand the vital formulas and logical steps needed to secure full marks in your exams.

X Science - Physics First Unit Important Questions - 2026-2027

1. Define inertia. Give its classification.

2. Classify the types of force based on their application.

3. If a 5 N and a 15 N forces are acting opposite to one another, find the resultant force and the direction of action of the resultant force.

4. Differentiate mass and weight.

5. Define moment of a couple.

6. State the principle of moments.

7. State Newton's second law.

8. Why a spanner with a long handle is preferred to tighten screws in heavy vehicles?

9. While catching a cricket ball the fielder lowers his hands backwards. Why?

10. How does an astronaut float in a space Shuttle?

11. Two bodies have a mass ratio of 3:4. The force applied on the bigger mass produces an acceleration of 12 m/s². What could be the acceleration of the other body, if the same force acts on it?

12. A ball of mass 1 kg moving with a speed of 10 m/s rebounds after a perfect elastic collision with the floor. Calculate the change in linear momentum of the ball.

13. A mechanic unscrews a nut by applying a force of 140 N with a spanner of length 40 cm. What should be the length of the spanner if a force of 40 N is applied to unscrew the same nut?

14. The ratio of masses of two planets is 2:3 and the ratio of their radii is 4:7. Find the ratio of their accelerations due to gravity.

15. Write the torque application.

16. Prove that F = ma.