# Laws Of Angular Motion

## Laws Of Angular Motion

In physics, the angular velocity is defined as the rate of change of angular displacement and is a vector quantity (more precisely, a pseudovector) which specifies the angular speed (rotational speed) of an object and the axis about which the object is rotating. The SI unit of angular velocity is radians per second, although it may be measured in other units such as degrees per second, degrees per hour, etc. Angular velocity is usually represented by the symbol omega (ω, rarely Ω).

Laws Of Angular Motion

### Laws Of Angular Motion

**Laws Of Angular Motion**

*Laws Of Angular Motion*

Laws Of Angular Motion

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This gyroscope remains upright while spinning due to its angular momentum.

In physics, angular momentum, moment of momentum, or rotational momentum is a vector quantity that represents the product of a body’s rotational inertia and rotational velocity about a particular axis. The angular momentum of a system of particles (e.g. a rigid body) is the sum of angular momenta of the individual particles. For a rigid body rotating around an axis of symmetry (e.g. the blades of a ceiling fan), the angular momentum can be expressed as the product of the body’s moment of inertia, I, (i.e., a measure of an object’s resistance to changes in its rotation velocity) and its angular velocity ω:

In this way, angular momentum is sometimes described as the rotational analog of linear momentum.

For the case of an object that is small compared with the radial distance to its axis of rotation, such as a tin can swinging from a long string or a planet orbiting in a circle around the Sun, the angular momentum can be expressed as its linear momentum, mv, crossed by its position from the origin, r. Thus, the angular momentum L of a particle with respect to some point of origin is

Angular momentum is conserved in a system where there is no net external torque, and its conservation helps explain many diverse phenomena. For example, the increase in rotational speed of a spinning figure skater as the skater’s arms are contracted is a consequence of conservation of angular momentum. The very high rotational rates of neutron stars can also be explained in terms of angular momentum conservation. Moreover, angular momentum conservation has numerous applications in physics and engineering (e.g., the gyrocompass).

http://teachingbd24.com/laws-of-angular-motion/Bangla VersionHSCNoteOld CurriculumPhysics 1st PaperEnergy And Power,Gravitation,Laws Of Angular Motion,Math Solution of Gravitation,Math Solution of Laws Of Angular Motion,Math Solution of Simple harmonic Oscillation,Math Solution of Work,Note of Elasticity,Note of Gravitation,Note of simple harmonic Oscillation,Note of Work,simple harmonic OscillationLaws Of Angular Motion In physics, the angular velocity is defined as the rate of change of angular displacement and is a vector quantity (more precisely, a pseudovector) which specifies the angular speed (rotational speed) of an object and the axis about which the object is rotating. The SI unit...Shah JamalShah Jamalsjamal59@gmail.comAdministratorI'm an assistant professor of Physics, Head of the department, in BAF Shaheen College Dhaka since 1984. I'm almost 30 years in the profession of teaching. If you have benefited from my website, please consider to sharing it among your friends.Teaching BD
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