The topic Rotational Motion is very important in NEET Physics. Rotational Motion will typically be about 14% of the NEET Physics section. This indicates that approximately 6 questions, out of 45 in the Physics section of the exam, will typically be from the topic of Rotational Motion. This chapter covers the idea of moving objects relative to an axis; which is helpful for understanding angular displacement, angular velocity, angular acceleration, torque, moment of inertia, and related terms.

In Rotational Motion, you will explore the relationships between linear and angular quantities, learn about rotational energy, and study the motion of rigid bodies. This chapter covers essential theorems such as the parallel axis theorem and perpendicular axis theorem, the conservation of angular momentum, and the rotational form of Newton's laws.

Rotational motion can be prepared well by practicing the NEET previous year questions on Rotational Motion. It can help understand important topics well such as determining a torque, the rotational kinetic energy of a body, or the motion of rolling objects. Also practicing questions improves your ability to apply theory to real-world problems.

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Here are some detailed NEET Previous year questions of the Rotational motion topic.

Question 1:

The moment of inertia of a thin rod about an axis passing through its mid point and perpendicular to the rod is 2400 g cm². The length of the 400 g rod is nearly:

[NEET UG - 2024]

A. 8.5 cm

B. 17.5 cm

C. 20.7 cm

D. 72.0 cm

View Solution

Question 2:

Let \( \omega_1 \), \( \omega_2 \), and \( \omega_3 \) be the angular speed of the second hand, minute hand, and hour hand of a smoothly running analog clock, respectively. If \( x_1 \), \( x_2 \), and \( x_3 \) are their respective angular distances in 1 minute, then the factor which remains constant (k) is:

[NEET UG - 2024]

A. \( \omega_1 x_1 = \omega_2 x_2 = \omega_3 x_3 = k \)

B. \( \omega_1 x_1 = \omega_2 x_2 = \omega_3 x_3 = k \)

C. \( \omega_1 x_1^2 = \omega_2 x_2^2 = \omega_3 x_3^2 = k \)

D. \( \omega_1 x_1^2 = \omega_2 x_2^2 = \omega_3 x_3^2 = k \)

View Solution

Question 3:

The radius of gyration of a solid sphere of mass 5 kg about XY is 5 m as shown in figure. The radius of the sphere is \( \frac{5\pi}{\sqrt{7}} \) m, then the value of \( x \) is:

[NEET UG - 2024]

A. 5

B. \( \sqrt{2} \)

C. \( \sqrt{3} \)

D. \( \sqrt{5} \)

View Solution

Question 4:

A uniform rod of length 200 cm and mass 500 g is balanced on a wedge placed at 40 cm mark. A mass of 2 kg is suspended from the rod at 20 cm and another unknown mass \( m \) is suspended from the rod at the 160 cm mark as shown in the figure. Find the value of \( m \) such that the rod is in equilibrium. (g = 10 m/s²)

[NEET UG - 2021]

A. \( \frac{1}{2} \) kg

B. \( \frac{1}{3} \) kg

C. \( \frac{1}{6} \) kg

D. \( \frac{1}{12} \) kg

View Solution

Question 5:

A ball of mass 1 kg and radius 0.5 m, starting from rest rolls down on a \( 30^\circ \) inclined plane. The torque acting on the ball at the distance of the 7 m from the starting point is close to (Take: Acceleration due to gravity as \( 10 \, \text{m/s}^2 \))

[NEET UG - 2019]

A. 0.25 N-m

B. 0.7 N-m

C. 0.5 N-m

D. 0.4 N-m

View Solution

Question 6:

A block of mass 10 kg is in contact against the inner wall of a hollow cylindrical drum of radius 1 m. The coefficient of friction between the block and the inner wall of the cylinder is 0.1. The minimum angular velocity needed for the cylinder to keep the block stationary when the cylinder is vertical and rotating about its axis, will be: (Take: \( g = 10 \, \text{m/s}^2 \))

[NEET UG - 2019]

A. \( \sqrt{10} \, \text{rad/s} \)

B. \( \frac{10}{\pi} \, \text{rad/s} \)

C. 10 \( \, \text{rad/s} \)

D. \( 10\pi \, \text{rad/s} \)

View Solution

Question 7:

A solid cylinder of mass 2 kg and radius 4 cm is rotating about its axis at the rate of 3 rpm. The torque required to stop after \( 2\pi \) revolutions is:

[NEET UG - 2019]

A. \( 2 \times 10^{-6} \, \text{N-m} \)

B. \( 2 \times 10^{-3} \, \text{N-m} \)

C. \( 12 \times 10^{-4} \, \text{N-m} \)

D. \( 2 \times 10^{6} \, \text{N-m} \)

View Solution

Question 8:

A solid sphere is in rolling motion. In rolling motion, a body possesses translational kinetic energy \( (K_t) \) as well as rotational kinetic energy \( (K_r) \) simultaneously. The ratio \( \frac{K_t}{(K_t + K_r)} \) for the sphere is:

[NEET UG - 2018]

A. 7:11

B. 10:7

C. 5:7

D. 2:5

View Solution

Question 9:

A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass the same. Which of the following physical quantities would remain constant for the sphere?

[NEET UG - 2018]

A. Angular velocity

B. Rotational kinetic energy

C. Moment of inertia

D. Angular momentum

View Solution

Question 10:

Two discs of the same moment of inertia rotating about their regular axis passing through the centre and perpendicular to the plane of the disc with angular velocities \( \omega_1 \) and \( \omega_2 \). They are brought into contact face to face coinciding the axis of rotation. The expression for loss of energy during this process is:

[NEET UG - 2017]

A. \( \frac{1}{2} l(\omega_1 + \omega_2)^2 \)

B. \( \frac{1}{4} l(\omega_1 - \omega_2)^2 \)

C. \( l(\omega_1 - \omega_2)^2 \)

D. \( \frac{1}{8} (\omega_1 - \omega_2)^2 \)

View Solution

Question 11:

The ratio of the accelerations for a solid sphere (mass \( m \) and radius \( R \)) rolling down an incline of angle \( \theta \) without slipping and slipping down the incline without rolling is:

[NEET UG - 2014]

A. 5:7

B. 2:3

C. 2:5

D. 7:5

View Solution

Question 12:

The ratio of radii of gyration of a circular ring and a circular disc, of the same mass and radius, about an axis passing through their centres and perpendicular to their planes are:

[NEET UG - 2013]

A. \( 1 : \sqrt{2} \)

B. \( 3 : 2 \)

C. \( 2 : 1 \)

D. \( \sqrt{2} : 1 \)

View Solution

Question 13:

The instantaneous angular position of a point on a rotating wheel is given by the equation \( \theta(t) = 2t^3 - 6t^2 \). The torque on the wheel becomes zero at:

[NEET UG - 2011]

A. \( t = 1 \, \text{s} \)

B. \( t = 0.5 \, \text{s} \)

C. \( t = 0.25 \, \text{s} \)

D. \( t = 2 \, \text{s} \)

View Solution

Question 14:

The moment of inertia of a uniform circular disc of radius \( R \) and mass \( M \) about an axis touching the disc at its diameter and normal to the disc is:

[NEET UG - 2006]

A. \( \frac{1}{2} MR^2 \)

B. \( MR^2 \)

C. \( \frac{2}{5} MR^2 \)

D. \( \frac{3}{2} MR^2 \)

View Solution

Question 15:

A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR, and RQ are \( F_1 \), \( F_2 \), and \( F_3 \) respectively and are in the plane of the paper and along the directions shown, the force on the segment QP is:

[NEET UG - 2008]

A. \( \sqrt{(F_3 - F_1)^2 - F_2^2} \)

B. \( F_3 - F_1 + F_2 \)

C. \( F_3 - F_1 - F_2 \)

D. \( \sqrt{(F_3 - F_1)^2 + F_2^2} \)

View Solution

NEET Exam Pattern

According to NTA guidelines, the NEET 2025 exam pattern has been changed. The pattern is now reverted to pre-COVID format in which there will be no choices in the questions.

There will be 180 questions in the NEET exam 2025, instead of 200. The sections are divided into equal questions, 45 questions each in Physics, Chemistry and 90 questions in Biology (45 questions each in Zoology and Botany). The time duration will be 3 hours. There are slight changes in syllabus also. You can check the latest NEET syllabus.

Subject Wise Analysis of NEET Exam

The NEET exam challenges students’ knowledge in three major subjects: Physics, Chemistry, and Biology. Here is a detailed subject-wise analysis of the NEET exam, showing the weightage of each subject.

Subject No. of Questions Marks Difficulty Level
Physics 45 180 Moderate to Difficult
Chemistry 45 180 Moderate
Biology (Botany + Zoology) 90 (45 + 45) 360 Easy to Moderate

Check: NEET Exam Analysis

This analysis is on the basis of the NEET Previous Year Questions Pattern and their level of difficulty. It can be different as per the exam every year. The NEET exam pattern is based on the latest 2025 pattern as per the NTA guidelines.

NEET Physics Paper Pattern

The NEET Physics paper is designed to assess a student's understanding of core Physics concepts at the senior secondary level. It consists of 45 questions, covering various topics such as Mechanics, Electrodynamics, Optics, Thermodynamics, and Modern Physics. These questions carry a significant weightage in the overall exam score, requiring students to have a strong grasp of theoretical principles and problem-solving techniques. The Physics paper plays a crucial role in determining the overall NEET score, and proper time management and conceptual clarity are key to scoring well in this section.

Here is a detailed description of the Physics section in the NEET exam:

1. Total Number of Questions:

  • The Physics section consists of 45 questions in total.

2. Marking Scheme:

  • Each correct answer awards +4 marks.
  • For each incorrect answer, -1 mark is deducted.
  • If a question is left unanswered, 0 marks are awarded (no penalty).

3. Types of Questions:

  • The questions are multiple-choice format, each having 4 options, with one correct answer.
  • The Physics questions will test your knowledge of various concepts, ranging from Mechanics, Thermodynamics, Fluid Mechanics, Electrodynamics, Optics, and Modern Physics.

4. Weightage of Topics:

The topics covered in the Physics section are distributed as follows:

  • Mechanics: Includes questions on laws of motion, work and energy, rotational motion, gravitation, etc.
  • Electrodynamics: Includes questions on electrostatics, current electricity, magnetic effects, and electromagnetic induction.
  • Optics and Wave Phenomena: Questions on light, reflection, refraction, and wave properties.
  • Thermodynamics and Kinetic Theory: Questions on laws of thermodynamics, heat transfer, and kinetic theory of gases.
  • Modern Physics: Includes topics like atomic structure, nuclear physics, and dual nature of matter.

5. Duration:

  • The total time allotted for the entire NEET exam is 3 hours (180 minutes). For Physics, this means you need to manage time efficiently to answer all 45 questions within the given time frame.

6. Strategy:

  • Focus on key concepts and formulas from each topic.
  • Practice problem-solving, as Physics questions often require applying theoretical knowledge to practical situations.
  • Prioritize questions based on your comfort with topics. Start with the ones you find easier to answer.

By understanding the NEET Physics exam pattern and topics, you can plan your preparation effectively and manage your time during the exam to maximize your score.

Chapter-Wise Distribution and Weightage Analysis for NEET Physics

The NEET Physics syllabus involves a lot of Topics and Comprehending the chapter-wise weightage can help you manage your preparation better. Here is a chapter-wise distribution and weightage analysis based on previous trends in NEET:

1. Mechanics (20% - 25%)

These are some key topics on which students can focus:

  • Laws of Motion
  • Work, Energy, and Power
  • Rotational Motion
  • Gravitation
  • Properties of Matter
  • Simple Harmonic Motion (SHM)

Mechanics is an essential section that includes a large number of questions. A solid understanding of these types of problems should help you solve the majority of the Physics problems.

2. Electrodynamics (20% - 25%)

This topic includes some important topics:

  • Electrostatics
  • Current Electricity
  • Magnetic Effects of Current
  • Electromagnetic Induction
  • Alternating Current

Electrodynamics encompasses considerable areas from Electrostatics and Magnetism, often appearing in NEET Physics. To do well on the exam, it's crucial to have a solid understanding of these topics since they are important.

3. Optics (10% - 12%)

The optics chapter consists of these important topics:

  • Reflection and Refraction
  • Lens and Mirrors
  • Wave Optics
  • Optical Instruments

Optics is considered a moderately weighted chapter in NEET, which contains several conceptual and numerical-based questions. Understanding the principles of light and its behavior in different media is also important.

4. Thermodynamics and Kinetic Theory of Gases (8% - 10%)

Some of the key topics in thermodynamics are:

  • Laws of Thermodynamics
  • Heat Transfer
  • Kinetic Theory of Gases
  • Engines and Refrigerators

Though it is not a lengthy chapter but it can be a scoring chapter if prepared well.

5. Modern Physics (12% - 15%)

The important topics of modern physics are:

  • Dual Nature of Matter
  • Atomic Structure
  • Nuclear Physics
  • Electronic Devices

This unit has become increasingly important in recent years, carries a significant weightage in NEET.

6. Fluid Mechanics and Properties of Matter (6% - 8%)

The important topics of fluid mechanics are:

  • Fluid Statics and Dynamics
  • Viscosity
  • Surface Tension

7. Waves and Sound (6% - 8%)

  • Key Topics:
    • Wave Motion
    • Sound Waves
    • Doppler Effect

8. Work, Energy, and Power (3% - 5%)

  • Key Topics:
    • Work-Energy Theorem
    • Conservation of Energy
    • Power

Also read: Physics Syllabus

Detailed Topic-Wise Weightage for Physics in NEET UG 2025

A brief chapter wise breakdown with expected weightage and number of questions from NEET Physics Section is given below

Chapter Weightage (%) Expected Number of Questions
Mechanics 20% - 25% 9 - 11 questions
Electrodynamics 20% - 25% 9 - 11 questions
Optics 10% - 12% 5 - 6 questions
Thermodynamics and Kinetic Theory of Gases 8% - 10% 4 - 5 questions
Modern Physics 12% - 15% 5 - 7 questions
Fluid Mechanics and Properties of Matter 6% - 8% 3 - 4 questions
Waves and Sound 6% - 8% 3 - 4 questions
Work, Energy, and Power 3% - 5% 1 - 2 questions

Key Points:

  • The estimation of the number of questions is determined by the percentage weight and the absolute number of Physics NEET questions (45).
  • The topics with a size that allow for more questions, like Mechanics, Electrodynamics, and Modern Physics, have a higher weightage than topics with less size, such as Work, Energy, and Power.
  • Focus on the chapters with a higher weightage but do not throw away the small chapters; these topics can contribute a few marks that may matter a lot.

Class-wise distribution of topics

Below is the chapter-wise distribution of NEET Physics topics divided into Class 11 and Class 12 topics along with the expected number of questions.

Class 11 Topics:

Chapter Weightage (%) Expected Number of Questions
Mechanics 20% - 25% 9 - 11 questions
Properties of Matter and Fluid Mechanics 6% - 8% 3 - 4 questions
Waves and Sound 6% - 8% 3 - 4 questions
Work, Energy, and Power 3% - 5% 1 - 2 questions

Class 11 Total Expected Questions: 16 - 21

Class 12 Topics:

Chapter Weightage (%) Expected Number of Questions
Electrodynamics 20% - 25% 9 - 11 questions
Optics 10% - 12% 5 - 6 questions
Thermodynamics and Kinetic Theory of Gases 8% - 10% 4 - 5 questions
Modern Physics 12% - 15% 5 - 7 questions

Class 12 Total Expected Questions: 23 - 29

Summary:

  • Class 11 Topics: Focus on foundational topics like Mechanics, Fluid Mechanics, Waves, and Work-Energy. These contribute to a significant portion of the exam with an expected 16-21 questions.
  • Class 12 Topics: Electrodynamics, Optics, Thermodynamics, and Modern Physics are heavily weighted in NEET, with an expected 23-29 questions.

Also Read: NEET Chapter Wise Weightage

NEET Previous Year Question Papers PDF with Answer Key and Solution

Year Question Paper PDF
2024 Download PDF
2023 Download PDF
2022 Download PDF
2021 Download PDF
2020 Download PDF
2019 Download PDF

Frequently Asked Questions

Q1. Is rotational motion there in NEET?

Answer. Yes, Rotational Motion is included in the NEET Physics syllabus. It is in the Mechanics portion of the syllabus and covers torque, angular momentum, moment of inertia, and rotational dynamics. This chapter has a fair amount of weightage in the exam and most of the questions pertain to linear motion concepts on rotating bodies.

Q2. Is rotational motion a tough chapter?

Answer. Many students struggle with Rotational Motion, as it modifies linear motion concepts into more complex ideas of torque, angular momentum, and moment of inertia. This requires a sound understanding of theoretical ideas and mathematical problems. That being said, with practice and a firm understanding of the important formulas and concepts, they can be mastered. You also need basic Rotational Motion information for NEET Physics.

Q3. What is the weightage of rotational motion in NEET?

Answer. In NEET Physics, Rotational Motion carries about 14% of the NEET physics. This usually means about 6-7 questions in the examination. Although Rotational Motion is not the biggest chapter, it is an important unit, and therefore it is important to understand the concepts behind it, so you can score the most points on the examination.

Q4. Is Circular motion in the NEET syllabus?

Answer. Indeed, Circular Motion is an important part of the NEET Physics syllabus. Basically, it is covered under the Mechanics section and includes topics such as uniform circular motion, centripetal force, angular velocity, and centripetal acceleration. This topic can be linked with Rotational Motion, as questions related to both are commonly asked in the exam.

Q5. What is the formula for torque in NEET?

Answer. The formula for torque in NEET is:

Torque = r × F = r F sin⁡θ

Where:

r is the position vector (distance from the axis of rotation to the point where the force is applied),

F is the applied force,

r is the magnitude of the position vector,

F is the magnitude of the applied force,

θ is the angle between the r position vector and the force vector F.

This formula determines the rotational effect of a force about a point or axis.

Q6. In which chapter we study torque?

Answer. Torque is introduced in the Rotational Motion portion of the NEET Physics syllabus. It plays a central role in the discussion of rotational dynamics of objects, where torque is used to describe the effect of a force that is applied off the axis of rotation. Torque is significant for angular momentum, rotational kinematics of objects and the dynamics of rigid bodies, among other topics.