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関連する概念動画

Angular Momentum: Single Particle01:10

Angular Momentum: Single Particle

Angular momentum is directed perpendicular to the plane of the rotation, and its magnitude depends on the choice of the origin. The perpendicular vector joining the linear momentum vector of an object to the origin is called the “lever arm.” If the lever arm and linear momentum are collinear, then the magnitude of the angular momentum is zero. Therefore, in this case, the object rotates about the origin such that it lies on the rim of the circumference defined by the lever arm magnitude.
The...
Conservation of Angular Momentum01:09

Conservation of Angular Momentum

A system's total angular momentum remains constant if the net external torque acting on the system is zero. Considering a system that consists of n tiny particles, the angular momentum of any tiny particle may change, but the system's total angular momentum would remain constant. The principle of conservation of angular momentum only considers the net external torque acting on the system. While there are internal forces exerted by different particles within the system that also produce internal...
Conservation of Angular Momentum: Application01:18

Conservation of Angular Momentum: Application

A system's total angular momentum remains constant if the net external torque acting on the system is zero. Examples of such systems include a freely spinning bicycle tire that slows over time due to torque arising from friction, or the slowing of Earth's rotation over millions of years due to frictional forces exerted on tidal deformations. However in the absence of a net external torque, the angular momentum remains conserved. The conservation of angular momentum principle requires a change...
Rolling Without Slipping01:09

Rolling Without Slipping

People have observed the rolling motion without slipping ever since the invention of the wheel. For example, one can look at the interaction between a car's tires and the surface of the road. If the driver presses the accelerator to the floor so that the tires spin without the car moving forward, there must be kinetic friction between the wheels and the road's surface. If the driver slowly presses the accelerator, causing the car to move forward, the tires roll without slipping. It is essential...
Angular Momentum01:21

Angular Momentum

Angular momentum characterizes an object's rotational motion and is defined as the moment of its linear momentum about a specified point O. When a particle moves along a curved path in the x-y plane, the scalar formulation calculates the magnitude of its angular momentum, utilizing the moment arm (d), representing the perpendicular distance from point O to the line of action of the linear momentum. Despite being scalar in formulation, angular momentum is inherently a vector quantity. Its...
Torque Free Motion01:15

Torque Free Motion

The torque-free motion refers to the movement of a rigid body in space when no external torques are acting upon it. This type of motion can be observed in environments where there are no external forces or frictions, like in outer space. For example, a rotation of Mars in space is a torque-free motion. Mars is an axisymmetric object, meaning it has an axis of symmetry along which it rotates, designated as the z-axis. The rotating frame of reference is defined such that the center of mass of...

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関連する実験動画

Updated: Jul 10, 2026

Analyzing the Movement of the Nauplius 'Artemia salina' by Optical Tracking of Plasmonic Nanoparticles
05:52

Analyzing the Movement of the Nauplius 'Artemia salina' by Optical Tracking of Plasmonic Nanoparticles

Published on: July 15, 2014

どうして金星は運動量を失ってしまったのか?

S F Singer

    Science (New York, N.Y.)
    |December 11, 1970
    PubMed
    まとめ

    金星は,おそらく速い,進んだ回転を持っていたが,月を捕まえた. このイベントは,火山活動を引き起こし,ガスを放出し,惑星を破壊し,金星の現在の遅い逆行回転を説明しました.

    科学分野:

    • 惑星科学 惑星科学
    • 天文学 (astronomy) 天文学 (astronomy) とは,天文学 (astronomy) とは,天文学 (astronomy) とは,天文学 (astronomy) とは
    • 地質物理学 地質物理学とは地質物理学です.

    背景:

    • 現在,金星はゆっくりと逆行回転しており,地上の惑星の予想される初期進行回転と対照的です.
    • 太陽の潮摩擦は,回転変化の一般的に認められたメカニズムですが,金星の観測された角運動量を説明するのに不十分です.
    • 惑星の初期回転は10〜20時間の周期で進行すると仮定されています.

    研究 の 目的:

    • 金星の異常な回転状態に関する新しいメカニズムを提案する.
    • 観測された金星の逆行と軽微な回転を説明するために.
    • 特定の天体現象を金星の地質活動と大気組成と関連付けるため.

    主な方法:

    • 逆行軌道から月の捕獲イベントの仮定.
    • このようなキャプチャの際に発生する角運動量移転の分析.
    • 惑星の内部における回転回転のエネルギー的な影響をモデル化.

    主要な成果:

    • 逆行軌道から捕獲された月は,実際に金星を反転させることができる.
    • 回転時の運動エネルギー損失は,内部熱に変換され,火山を発生させます.

    さらに関連する動画

    Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System
    09:44

    Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System

    Published on: June 5, 2014

    Scattering And Absorption of Light in Planetary Regoliths
    11:34

    Scattering And Absorption of Light in Planetary Regoliths

    Published on: July 1, 2019

    関連する実験動画

    Last Updated: Jul 10, 2026

    Analyzing the Movement of the Nauplius 'Artemia salina' by Optical Tracking of Plasmonic Nanoparticles
    05:52

    Analyzing the Movement of the Nauplius 'Artemia salina' by Optical Tracking of Plasmonic Nanoparticles

    Published on: July 15, 2014

    Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System
    09:44

    Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System

    Published on: June 5, 2014

    Scattering And Absorption of Light in Planetary Regoliths
    11:34

    Scattering And Absorption of Light in Planetary Regoliths

    Published on: July 1, 2019

  • この出来事は,かなりの量の揮発性物質の放出を促進し,金星の大気に寄与します.

    • 結論:

    • 月の捕獲は,金星の現在の遅い逆行回転の合理的な説明です.
    • この衝突イベントは,金星のスピン状態,火山活動,および揮発性在庫の統一された説明を提供します.
    • 月自身は,金星の表面と衝突したときに破壊されていたでしょう.