Introduction:
Gravitation is a fundamental chapter in Physics that deals with the study of the gravitational force between objects. On the other hand, rotational motion and system of particles are two other important chapters in Physics. Many students often wonder whether they need to learn rotational motion and system of particles chapter in order to start gravitation. In this response, we will explore whether these chapters are interconnected and whether one needs to learn them in a specific order.

Rotational Motion:
Rotational motion is a chapter in Physics that deals with the motion of objects that rotate around an axis. In this chapter, students learn about torque, angular momentum, moment of inertia, and other related concepts. Rotational motion is an important chapter in Physics because many physical systems exhibit rotational motion, such as planets orbiting around the sun.

System of Particles:
System of particles is another important chapter in Physics that deals with the motion of a group of particles. In this chapter, students learn about the center of mass, momentum, and collision between particles. The system of particles is an important chapter in Physics because many physical systems involve the motion of multiple particles, such as planets in our solar system.

Gravitation:
Gravitation is a chapter in Physics that deals with the study of the gravitational force between objects. In this chapter, students learn about the law of gravitation, gravitational potential, and escape velocity. Gravitation is an important chapter in Physics because it helps us understand the motion of planets, stars, and other celestial objects.

Interconnection:
Rotational motion and system of particles are not completely interconnected with gravitation. While there may be some concepts that overlap between these chapters, they can be studied independently. However, it is recommended that students learn these chapters in a specific order, as they build upon each other. Here is the recommended order:

1. System of particles
2. Rotational motion
3. Gravitation

By learning these chapters in this order, students will have a better understanding of the concepts and will be able to apply them more effectively.

Conclusion:
In conclusion, while rotational motion and system of particles are not completely interconnected with gravitation, it is recommended that students learn these chapters in a specific order. By learning these chapters in the recommended order, students will have a better understanding of the concepts and will be able to apply them more effectively.

Gravitation chap is similar to electrostats..as mass is concerned in gravitation, so u just need simple idea of centre of mass..like for spherical bodies, centre of mass will be at it's centre..