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Laws of Motion

NIOS · Class 12 · Physics

Step-by-step guide to study Laws of Motion in NIOS Class 12 Physics. Topics to cover, practice strategy, and time allocation.

44 questions35 flashcards5 concepts

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Illustrations demonstrating the three types of inertia: inertia of rest, inertia of motion, and inertia of direction, using common real-world scenarios.
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Study Plan

1
Day 1–2

Learn the Theory

Read the textbook chapter carefully. Note down definitions, formulas, and key concepts.

2
Day 3

Practice Problems

Solve textbook exercises and additional practice questions. There are 44 questions available for this chapter.

3
Day 4

Revise & Test

Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding. Mark weak areas for re-revision.

4
Day 7

Spaced Revision

Revisit Laws of Motion after a week. Use flashcards for quick recall. Solve previous year questions from this chapter.

What to Focus On

  • Inertia is the tendency of a body to resist change in its state of rest or uniform motion.
  • Mass is the measure of inertia — greater mass means greater inertia.
  • Force is a vector quantity that can change shape, size, speed, or direction of motion.

  • Newton's First Law: A body stays at rest or in uniform motion unless acted upon by a net external force.
  • This law is also called the Law of Inertia.
  • Galileo's experiments with inclined planes provided the basis for this law.

  • Linear momentum p = mv is a vector quantity with SI unit kg m/s.
  • Newton's Second Law: F = dp/dt = ma (for constant mass).
  • 1 Newton = force producing 1 m/s² acceleration in 1 kg mass.

Common Mistakes to Avoid

A moving object needs a continuous force to keep moving at constant velocity

Action and reaction forces cancel each other out, so nothing can ever move

Heavier objects fall faster than lighter objects

Memory Tips

Newton's First Law — Law of Inertia

Three Newton's Laws in Order

Newton's Second Law — F = ma

Momentum p = mv

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Frequently Asked Questions

What are the important topics in Laws of Motion for NIOS Class 12 Physics?
Key topics in Laws of Motion include Laws of Motion — Complete Concept Map, Laws of Motion – Complete Chapter Overview, A mind map showing all major topics covered in the Laws of Motion chapter, branching from the central concept.. These are the concepts NIOS Class 12 examiners draw on most — study them first, then practise related questions.
How to score full marks in Laws of Motion — NIOS Class 12 Physics?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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