Centre of Mass and System of Particles NEET 2025 Notes
Centre of Mass and System of Particles NEET 2025: The Centre of Mass and System of Particles is an essential chapter for NEET aspirants. A comprehensive understanding of this chapter is crucial for strengthening the fundamental role of physics, particularly in mechanics. This topic explains the motion and interaction of individual particles as well as particle systems, which provide the basis for advanced topics.
Many questions in the NEET exam are asked from the Centre of Mass and System of Particles. Therefore, candidates must focus on strengthening their command of this chapter. Access to the Centre of Mass and System of Particles NEET 2025 notes help candidates effectively prepare for the competitive exam. Additionally, candidates can use these notes for quick revision before the exam.
What is Centre of Mass?
The Centre of Mass of an object or a system is the point where the entire mass of the system can be considered to be concentrated. It represents the weighted average position of all the particles within the system based on their masses.
In simple terms, the centre of mass indicates the mean position of mass distribution in space. When an external force is applied at this point, it results in linear motion rather than rotational movement.
While analysing the motion of a system, it is not necessary to study the movement of each individual particle. Instead, the system’s dynamics can be understood by focusing on the motion of a single representative point.
Centre of Mass
The Centre of Mass plays a crucial role in mechanics as it simplifies the analysis of motion for complex and irregularly shaped objects. When a uniform force is applied at this point, it influences the entire system, making calculations easier. Instead of dealing with the distributed mass of an object, we assume that all its mass is concentrated at a single point located at the centre of mass. This assumption helps in solving mechanics problems efficiently.
Centre of Gravity
The Centre of Gravity is the point where the entire gravitational force acts on an object or system. It is the location at which the gravitational torque becomes zero. In cases where the gravitational field is uniform, the centre of mass and the centre of gravity coincide, leading to their interchangeable use in many contexts.
What is the System of Particles?
A system of particles refers to a collection of multiple atoms or molecules that together form a macroscopic object. Since analysing each particle individually is impractical, fundamental principles of particle mechanics are considered to describe the system’s overall behaviour.
The motion of such a system can be divided into two key components:
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Centre of Mass (CM) Motion: The entire system can be treated as a single particle, with its mass concentrated at the centre of mass. This helps simplify calculations related to motion.
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Internal Motion: The movement of individual particles within the system, analysed from the perspective of an observer at the centre of mass.
In rigid bodies, these particles may move in a translational manner while still interacting with one another. These interactions result in the generation of internal forces, which always occur in equal and opposite pairs. Additionally, external forces can act on some or all of the particles in the system. When a force is applied by an external object to any particle within the system, it is classified as an external force.
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Significance of System of Particles and Rotational Motion
The System of Particles and Rotational Motion chapter in Class 11 Physics plays a crucial role in building a strong foundation in mechanics. It introduces key concepts such as rotational momentum, angular velocity, torque, and the centre of mass, helping students transition from rectilinear motion to rotational dynamics.
This chapter enables students to explore the principles governing the motion of rigid bodies, emphasising the role of the centre of mass in translation and rotation. It also provides a detailed understanding of how mass distribution affects rotational movement. Additionally, students can understand essential topics like angular momentum, torque, the radius of gyration, and the parallel and perpendicular axis theorems.
By mastering this chapter, NEET aspirants can accurately solve various mechanics problems during the NEET exam. Additionally, well-structured notes can aid in understanding various definitions, formula derivations, and their interrelations, making it easier to apply these concepts during the exams.
Benefits of Centre of Mass and System of Particles NEET 2025 Notes
Mastering the System of Particles and Rotational Motion is crucial for NEET aspirants, as it lays the foundation for understanding advanced physics concepts. Well-structured notes in this chapter can make learning easier, helping students retain key principles and apply them effectively in problem-solving.
Below are the key benefits of using these notes:
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Simplified Concepts: Effectively created notes break down complex topics into easily understandable explanations.
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Comprehensive Coverage: Includes definitions, derivations, and formulas for quick revision before the exam.
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Time-Saving Resource: Concise content allows students to revise efficiently without going through lengthy textbooks.
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Enhanced Retention: Structured notes help in better recall of essential concepts during exams.
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Quick Formula Reference: These notes are ideal for last-minute revisions and solving practice problems.
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Doubt Resolution: Helps students clarify fundamental concepts independently. This way, they improve self-learning.
Centre of Mass and System of Particles NEET 2025 Notes FAQs
Q1. Can I skip Rotational Motion for NEET?
Ans. Questions from Rotational Motion a frequently asked in the NEET exam. Therefore, to score good marks in NEET, students should cover this topic and strengthen their grasp of the concepts and principles of this chapter.
Q2. What is the weightage of Centre of Mass and System of Particles in NEET?
Ans. Centre of Mass and System of Particles carry 5-7% weightage in the NEET exam.
Q3.What is the difference between Centre of Mass and Centre of Gravity?
Ans. The Centre of Mass is the point where the entire mass of a system can be considered concentrated, whereas the Centre of Gravity is the point where the gravitational force acts.
Q4. Are notes enough for NEET preparation?
Ans. Chapter-wise notes are essential to strengthen understanding and revise key concepts quickly. However, candidates must consider referring to NCERT textbooks, sample papers, PYPs, and mock tests to improve their conceptual clarity and problem-solving skills.
Q5. How many questions are asked from Centre of Mass and System of Particles in NEET?
Ans. On average, 2-3 questions are asked from this chapter in NEET.
