Newton’s First Law of Motion:
In the absence of external forces, an object at rest will remain at rest, and
an object in motion will continue in motion with a constant velocity.
Newton’s Second Law of Motion:
The acceleration of an abject is directly proportional to the resulting force
acting on it and inversely proportional to its mass.
F = ma
Newton’s Third Law of Motion:
If two bodies interact, the force exerted on body 1 by the body 2 is equal to
and opposite in direction to the force exerted on body 2 by body 1.
F12 = -F21
http://www.physik.rwth-aachen.de/group/thphys/tpe/tpe.html
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