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## NCERT Solutions for class 11 physics Chapter 7 SYSTEM OF PARTICLES AND ROTATIONAL MOTION

Ncert Solutions for class 11 physics Chapter 7 SYSTEM OFPARTICLES AND ROTATIONAL MOTION is prepared by CBSE STUDENT eCARE Expert to score good marks in class 11. Class 11 physics Chapter 7 SYSTEM OFPARTICLES AND ROTATIONAL MOTION contains many topics which are very important to score good in class 11. There are some important topics of Chapter 7 SYSTEM OFPARTICLES AND ROTATIONAL MOTION is mentioned below:

The combination of rotational motion and the translational motion of a rigid body is known as rolling motion. According to the law of conservation of angular momentum, if there is no external couple acting, the total angular momentum of a rigid body or a system of particles is conserved.

## Class 11 Physics NCERT Solutions for Chapter 7 System of Particles and Rotational Motion

Ideally, a rigid body is one for which the distances between different particles of the body do not change, despite force acting on them. A rigid body fixed at one point or along a line can have only rotational motion. A rigid body not fixed in some way can have either pure translation or a combination of translation and rotation. Some key points on the System of Particles and Rotational Motion are given below.

• To determine the motion of the centre of mass of a system without knowledge of internal forces of the system is required. For this purpose, we need to know only the external forces on the body
• Newton’s Second Law for finite-sized bodies (or systems of particles) is based in Newton’s Second Law and also Newton’s Third Law for particles.
• The total torque on a system is independent of the origin of the total external force is zero.

Any real body which we encounter in daily life has a finite size. In dealing with the motion of extended bodies (bodies of finite size) the idealised model of a particle is inadequate. The system of Particles and Rotational Motion is a crucial chapter in CBSE Class 11. Students must prepare this chapter well to score high in their exams. The solutions are given below so that students can understand the concepts of this chapter in-depth.

## Some Questions are asked by class 11 Students related to Chapter 7 SYSTEM OFPARTICLES AND ROTATIONAL MOTION

What is the difference between rotational and translational motion?

Translational motion is motion that involves the sliding of an object in one or more of the three dimensions: x, y or z. ... Rotational motion is where an object spins around an internal axis in a continuous way.

What is a rotary motion?

The rotary motion includes the physical motion of a certain object which is spinning on an axis of its own. ... When we say that a certain object has uniform rotational motion, uniform circular motion, or uniform rotary motion, it means that the direction in which the object is moving doesn't change.

What is the meaning of system of particles?

system of particles means a group of particles inter-related. The equations for a system of particles can be readily used to develop those for a rigid body. One new but very important concept introduced with a system of particles is the center of mass.

How does torque relate to rotational motion?

When a torque is applied to an object it begins to rotate with an acceleration inversely proportional to its moment of inertia. This relation can be thought of as Newton's Second Law for rotation. The moment of inertia is the rotational mass and the torque is rotational force. Angular motion obeys Newton's First Law.

What are the 4 types of motions?

In the world of mechanics, there are four basic types of motion. These four are rotary, oscillating, linear and reciprocating. Each one moves in a slightly different way and each type of achieved using different mechanical means that help us understand linear motion and motion control.