Newton's Three Laws [ Back ]
 Isaac Newton developed many theories of physics.  He was and still is considered to be one of the greatest thinkers of all time.  Newton's laws pertain to different aspects of science that were mysterious at the time.  Newton's first law states that every object continues in its normal state of motion unless compelled by an outside force to move.  A force is anything that causes an object to accelerate, or, more simply, a push or a pull.  If an object is at rest, it will stay at rest and if an object is moving it will stay moving at its constant velocity.     Newton's second law states that the acceleration of an object is directly proportional to the force and inversely proportional to the mass of the object.  This deals with some new issues.  Newton brings up some new philosophies and new scientific methods and definitions.  Non-free fall, for example, is one.  Non free fall is when an object falls through the air with no other outside forces acting on it besides air drag or air friction, which is the force pulling in the opposite direction to keep the object moving.  The friction on an object is always equal to the force the object is traveling at.      Newton's third law states that for every action there is an opposite and equal reaction.  In other words, if one hits a nail with a hammer, the nail also hits the hammer back with the same amount of force.  The only difference between the two forces is that they travel in opposite directions.   For example, when a car drives on the road, not only do the tires push on the road, but the road also pushes on the tires.  This is essentially what makes a car go.  Newton's third law applied greatly to the building of the Wall because the builders used hammers to pound in the dirt and the stakes.  In return, the dirt and the stakes pounded back on the hammers. [ Title Page ] [ Physics ] [ History ] [ Chinese Architecture ] [ Labs and Experiments ] [ Interactions ] [ Photo Gallery ] [ Bibliography ] [ About the Designers ]