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Newton's First and Second laws, in Latin, from the original 1687 edition of the
Principia Mathematica.
Newton's laws of motion are three
physical laws which provide
relationships between the
forces acting on a
body and the
motion of the body, first compiled by
Sir Isaac Newton. Newton's laws were first published together in his work
Philosophiae Naturalis Principia Mathematica (
1687). The laws form the basis for
classical mechanics. Newton used them to explain many results concerning the motion of physical objects. In the third volume of the text, he showed that the laws of motion, combined with his
law of universal gravitation, explained
Kepler's laws of planetary motion.
Briefly stated, the three laws are:
- An object in motion will remain in motion unless acted upon by a net force.
- Force equals mass multiplied by acceleration.
- To every action there is an equal and opposite reaction.
Contents
[
hide]
[edit] The statements of the laws
Newton's laws of motion describe the
acceleration of
massive objects. The
modern understanding of Newton's three laws of motion is that,,:
First Law If no net
force acts on a particle then the particle moves without any change in
velocity (When observed from a set of
reference frames, called
inertial reference frames). Second Law (When observed from a set of
reference frames, called
inertial reference frames) The net force on a particle is proportional to the time rate of change of its linear
momentum. Momentum is the product of mass and velocity. (This law is often stated as
F =
ma (the force on an object is equal to its mass multiplied by its acceleration).
*Third Law Whenever a particle A exerts a force on another particle B, B simultaneously exerts a force on A with the same magnitude in the opposite direction, these two forces act along the same line. __________________________________________________ _ *Isn't this an equal and opposite reaction? Best regards, - RP http://forums.delphiforums.com/EinsteinGroupie