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FAQs on Quick Revision: System of Particles & Rotational Motion - Physics for Airmen Group X - Airforce X Y / Indian Navy SSR

1. What is a system of particles in rotational motion?
Ans. A system of particles in rotational motion refers to a collection of particles that are moving in a circular or rotational manner. These particles may be connected or interacting with each other, and their motion is governed by principles of rotational dynamics.
2. How is the center of mass relevant in rotational motion?
Ans. The center of mass is an important concept in rotational motion as it helps determine the overall motion and stability of a system of particles. The center of mass acts as a reference point for analyzing the rotational motion, and it follows its own trajectory based on the distribution of mass within the system.
3. What is the moment of inertia in rotational motion?
Ans. The moment of inertia in rotational motion is a measure of the resistance of a system of particles to changes in its rotational motion. It depends on the mass distribution of the particles and their distance from the axis of rotation. The moment of inertia plays a significant role in determining the angular acceleration and rotational energy of the system.
4. How is angular momentum conserved in a system of particles in rotational motion?
Ans. Angular momentum is conserved in a system of particles in rotational motion when there is no external torque acting on the system. This conservation principle states that the total angular momentum of the system remains constant, regardless of any internal redistribution of angular momentum between the particles.
5. How does the parallel axis theorem apply to rotational motion?
Ans. The parallel axis theorem is applicable in rotational motion when calculating the moment of inertia of a system of particles about an axis parallel to the original axis. It states that the moment of inertia about the parallel axis is equal to the sum of the moment of inertia about the original axis and the product of the total mass and the square of the distance between the two axes. This theorem is useful in situations where the axis of rotation is not through the center of mass.
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