Difference between revisions of "Force"

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A push or pull that changes the motion of an object.<ref>Wile, Dr. Jay L. ''Exploring Creation With General Science''. Anderson: Apologia Educational Ministries, Inc. 2000</ref>. The force is related to the [[acceleration]] of the object by [[Newton's Second Law]], which states that F = m*a, that is, force equals mass times acceleration.<ref>Marcelo Alonso and Edward J. Finn, ''Fundamental University Physics'', Addison-Wesley.</ref>
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Force is defined as rate of change of momentum of a body . F= dp/dt , p= mv  , F= ma where F stands for total vector sum of all forces
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, m for mass of the object, a for its acceleration expressed as a vector, p stands for momentum vector  and v for velocity vector. It
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was stated first by Sir Isaac Newton.  
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  When the velocity of the object approaches light speed it's effective mass changes. Then it is expressed as 
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chttp://upload.wikimedia.org/math/9/7/3/9735e356575f486ff6bdbb9cebd7f1d8.png
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The types of forces are
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1. Electro-magnetic force
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2. gravitational Force
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3. Strong force
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4. weak force
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==References==
 
==References==

Revision as of 05:55, March 15, 2007

Force is defined as rate of change of momentum of a body . F= dp/dt , p= mv , F= ma where F stands for total vector sum of all forces , m for mass of the object, a for its acceleration expressed as a vector, p stands for momentum vector and v for velocity vector. It was stated first by Sir Isaac Newton.


 When the velocity of the object  approaches light speed it's effective mass changes. Then it is expressed as  

chttp://upload.wikimedia.org/math/9/7/3/9735e356575f486ff6bdbb9cebd7f1d8.png


The types of forces are

1. Electro-magnetic force 2. gravitational Force 3. Strong force 4. weak force



References