Syllabify LogoSyllabify
HomeBrowse ExamsDownload App
Syllabify LogoSyllabify

HomeBrowse Exams
Download App
Theme
Syllabify LogoSyllabify
HomeBrowse ExamsDownload App
Syllabify LogoSyllabify

HomeBrowse Exams
Download App
Theme
Syllabify LogoSyllabify

Your companion for professional and national entrance exam preparation. Detailed syllabus, tracking, and more.

Top Exams

  • IIT JEE
  • NEET
  • UPSC Civil Services
  • SSC CGL
  • GATE

Legal & Support

  • Privacy Policy
  • Terms & Conditions
  • Contact Us

Get the App

GET IT ONGoogle Play
© 2026 Syllabify. All rights reserved.
Made with by Unitech Studio
Syllabify LogoSyllabify
HomeBrowse ExamsDownload App
Syllabify LogoSyllabify

HomeBrowse Exams
Download App
Theme
Syllabify LogoSyllabify
HomeBrowse ExamsDownload App
Syllabify LogoSyllabify

HomeBrowse Exams
Download App
Theme
  1. Exams
  2. IIT JEE
  3. Physics
  4. Rotational motion
68 marks

Rotational motion

This chapter deals with the rotational dynamics of rigid bodies, including torque, angular momentum, moment of inertia, and rolling motion.

12 Topics
40h prep
2.7% subject weight
12 Topics
1

Centre of the mass of a two-particle system

2m1/10
📌 Key Formular_cm = (m₁r₁ + m₂r₂)/(m₁+m₂)
2

Centre of the mass of a rigid body

2m3/10
📌 Key FormulaFor continuous bodies: r_cm = (∫ r dm)/M
3

Basic concepts of rotational motion

2m2/10
📌 Key FormulaAngular displacement θ, angular velocity ω = dθ/dt, angular acceleration α = dω/dt
4

A moment of a force

2m2/10
📌 Key Formulaτ = r × F
5

Torque

2m2/10
📌 Key Formulaτ = Iα
6

Angular momentum

2m3/10
📌 Key FormulaL = r × p, for rigid body L = Iω
7

Conservation of angular momentum and its applications

2m4/10
📌 Key FormulaIf Στ_ext = 0, then L = constant.
8

The moment of inertia

2m3/10
📌 Key FormulaI = Σ mᵢ rᵢ², depends on axis of rotation.
9

The radius of gyration

2m2/10
📌 Key Formulak = √(I/M)
10

Values of moments of inertia for simple geometrical objects

2m3/10
📌 Key FormulaRod, ring, disc, sphere etc.
11

Parallel and perpendicular axes theorems and their applications

2m4/10
📌 Key FormulaParallel: I = I_cm + Md², Perpendicular: I_z = I_x + I_y (for laminar bodies)
12

Rigid body rotation equations of rotational motion

2m3/10
📌 Key Formulaω = ω₀ + αt, θ = ω₀t + ½αt², ω² = ω₀² + 2αθ