Gravitation is one of the four fundamental forces in nature. The force between objects on Earth and Earth itself is called gravity.

Like other forces, gravity does work on an object if it displaces it toward the Earth's center. In this case, the work done by gravity is said to be positive. If an external force acts on the object against the pull of gravity and manages to lift it away from the Earth's center, work is done against gravity. In this case, the net work done is said to be negative. If an object moves along the Earth and has no displacement toward or away from the Earth's center, then no work is done by or against gravity.

Of course, no object on Earth is a particle. The center of mass framework developed in studying composite objects bypasses this problem. A single particle of mass equal to the object's total mass can be considered to be present at the object's center of mass before considering the effect of external forces, including gravity.

Tags
GravityGravitational ForceWork Done By GravityPositive WorkNegative WorkExternal ForceDisplacementCenter Of MassComposite ObjectsMass

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7.13 : Work Done by Gravity

Work and Kinetic Energy

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7.1 : Arbeit

Work and Kinetic Energy

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7.2 : Positiv, negativ und Null Arbeit

Work and Kinetic Energy

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7.3 : Energie

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7.4 : Arten potenzieller Energie

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7.5 : Arten von kinetischer Energie

Work and Kinetic Energy

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7.6 : Kinetische Energie - I

Work and Kinetic Energy

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7.7 : Kinetische Energie - II

Work and Kinetic Energy

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7.8 : Arbeits-Energie-Theorem

Work and Kinetic Energy

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7.9 : Arbeit und Energie für variable Kräfte

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7.10 : Arbeitsenergiesatz für die Bewegung entlang einer Kurve

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7.11 : Arbeiten, die über einer schiefen Ebene ausgeführt werden

Work and Kinetic Energy

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7.12 : Arbeit vieler Kräfte

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7.14 : Macht

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7.15 : Kraft, die von einer konstanten Kraft verbraucht wird

Work and Kinetic Energy

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