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Introduction to forces

From Mechanics

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(New page: ==Newton's First Law== A particle will move with a constant velocity or remain at rest if the resultant force on the particle is zero. '''Equilibrium''' If the resultant force on a par...)
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Revision as of 14:32, 13 March 2009

Newton's First Law

A particle will move with a constant velocity or remain at rest if the resultant force on the particle is zero.

Equilibrium

If the resultant force on a particle is zero, then the forces acting on the particle are said to be in equilibrium.

The Universal Law of Gravitation


F=d2Gm1m2


G=66710−11 kg-1m3s-2


Gravity on Earth

The force of gravity is often called the weight.


F=mgg=98 ms-2


Data


Radius of Earth is 637106 metres

Mass of Earth is 5981024 kg

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