Dear readers, here we are offering System of Particles and Rotational Motion Notes PDF to all of you. The system of Particles and Rotational Motion is one of the important topics in physics. If you are a science student then you might be aware of the significance of this topic.

This chapter teaches you about the Center of Mass, the Centre of Mass of the System of n Particles, and the Centre of Mass of Two Particle System. You can get a lot of help and guidance through the given System of Particles and Rotational Motion Notes pdf file.

System of Particles and Rotational Motion Notes PDF

System of particles and rotational motion comes under the fifth unit, Motion of system and particles. This along with Unit IV and Unit VI have a total weightage of 17 marks, which implies students will definitely find questions from this chapter. This is purely an understanding-based chapter that talks about the system of particles and rotational motion. The topics extensively covered in the notes of physics class 11 chapter 7 are:

• Centre of mass and its motion.
• Centre of mass of a 2 particle system, rigid body, and a uniform rod.
• The momentum of force and momentum conservation.
• Torque.
• Moment of Inertia.
• Angular momentum and laws of conservation of momentum.
• The radius of gyration.
• Parallel and perpendicular axis theorem.

Given below are brief explanations of some important concepts and topics covered in the chapter. For an in-depth understanding of the same, refer to notes on a system of particles and rotational motion in class 11.

• Centre of Mass

The center of mass of a body is the point at which the entire mass of the body is said to be concentrated at. It is also defined as the balancing point of the system. If any external force is to be applied at the center of mass, the body is said to remain unaffected. It means that the body will stay at rest if at rest and there will be no change in the velocity of the body in motion.

• Torque

The turning effect of force about a fixed axis is defined as Torque. It can also be defined as the Moment of force. The SI unit of Torque is Nm

• Moment of Inertia

Moment of Inertia is the phenomenon by which the body in motion opposes the change in its rotational motion. Mathematically, it is defined as the product of the mass of particles and their distance from the axis of rotation. It is also called the rotational inertia of the body.

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