Motion of System of Particles and Rigid Body

Short Definition

Motion of system of particles studies how groups of particles move together. Rigid body motion is the movement of a body in which the distance between particles remains constant.

Detailed Explanation

A system of particles can rotate, translate, or move in combination. A rigid body maintains its shape during motion. Concepts like center of mass, torque, and moment of inertia are used to describe their motion.

Key Concepts

• Center of Mass: The point representing the average position of mass of a system.
• Torque (Moment of Force): τ = r × F, causes rotational motion.
• Moment of Inertia: Resistance of a body to rotational motion.
• Angular Momentum: L = Iω

Importance

This chapter helps understand rotational dynamics, machinery, vehicle motion, and planetary motion in physics and engineering.