Chapter 21 of 36
Revision Notes
Vectors — Revision Notes
JEE Mains · Physics
Free Vectors revision notes for JEE Mains Physics 2026 — key concepts, formulas, and definitions for quick revision.
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Key concepts, formulas, and definitions from Vectors for JEE Mains Physics preparation.
Key Topics to Revise
1
Vector and Scalar Quantities
- Scalar quantities have only magnitude (mass, volume, density, temperature, work, energy)
- Vector quantities have both magnitude and direction (displacement, velocity, acceleration, force)
- For a quantity to be a vector, it must obey the parallelogram law of addition
2
Types of Vectors
- Equal vectors: Same magnitude and direction
- Parallel vectors: Same direction but may have different magnitudes
- Anti-parallel vectors: Opposite directions
3
Vector Addition and Subtraction
- Parallelogram law: Resultant is diagonal of parallelogram with vectors as adjacent sides
- Triangle law: Place tail of second vector at head of first, resultant joins tail of first to head of second
- Vector addition is commutative: A⃗ + B⃗ = B⃗ + A⃗
4
Resolution of Vectors
- Any vector can be resolved into perpendicular components
- For 2D: A⃗ = Axî + Ayĵ where Ax = A cos θ, Ay = A sin θ
- For 3D: A⃗ = Axî + Ayĵ + Azk̂
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Key Concepts
Scalars have only magnitude (mass =Vectors denoted as A⃗ or boldParallelogram LawAny vector A⃗ = Axî +A⃗ · B⃗ = AB cos
Frequently Asked Questions
What topics are covered in Vectors for JEE Mains?
Vectors is an important chapter in JEE Mains Physics. It covers key concepts and formulas that are frequently tested in the exam. Key topics include: Vector and Scalar Quantities, Types of Vectors, Vector Addition and Subtraction, Resolution of Vectors.
How important is Vectors for JEE Mains?
Vectors is a frequently tested chapter in JEE Mains Physics. Questions from this chapter appear regularly in previous year papers. There are 52 practice questions available for this chapter.
How to prepare Vectors for JEE Mains?
Start by understanding the core concepts, then solve practice questions. Focus on formulas and their applications. Use revision notes for quick review before the exam.
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