Changes

In common usage, however, people may also use the term "inertia" to refer to an object's "amount of [[resistance]] to [[change]] in [[velocity]]" (which is quantified by its mass), or sometimes to its [[momentum]], depending on the [[context]] (e.g. "this object has a lot of inertia"). The term "inertia" is more properly understood as shorthand for "the principle of inertia" as described by Newton in his ''[http://en.wikipedia.org/wiki/Newton%27s_laws_of_motion First Law of Motion]''. This [[law]], [[expressed]] simply, says that an object that is not subject to any net external force moves at a constant velocity. In even simpler terms, inertia means that an object will always continue moving at its current speed and in its current direction until some force causes its speed or direction to [[change]]. This would include an object that is not in motion (velocity = zero), which will remain at rest until some force causes it to move.

In common usage, however, people may also use the term "inertia" to refer to an object's "amount of [[resistance]] to [[change]] in [[velocity]]" (which is quantified by its mass), or sometimes to its [[momentum]], depending on the [[context]] (e.g. "this object has a lot of inertia"). The term "inertia" is more properly understood as shorthand for "the principle of inertia" as described by Newton in his ''[http://en.wikipedia.org/wiki/Newton%27s_laws_of_motion First Law of Motion]''. This [[law]], [[expressed]] simply, says that an object that is not subject to any net external force moves at a constant velocity. In even simpler terms, inertia means that an object will always continue moving at its current speed and in its current direction until some force causes its speed or direction to [[change]]. This would include an object that is not in motion (velocity = zero), which will remain at rest until some force causes it to move.

<center>For lessons on the [[topic]] of [[Inertia]], follow [http://nordan.daynal.org/wiki/index.php?title=Category:Inertia this link].</center>

<center>For lessons on the [[topic]] of [[Inertia]], follow [https://nordan.daynal.org/wiki/index.php?title=Category:Inertia this link].</center>

On the surface of the Earth the nature of inertia is often masked by the effects of [[friction]], which generally tends to decrease the speed of moving objects (often even to the point of rest), and by the acceleration due to [[gravity]]. The effects of these two forces misled [[classical]] [[theorists]] such as [http://en.wikipedia.org/wiki/Aristotle Aristotle], who believed that objects would move only as long as force was being applied to them.[2][http://en.wikipedia.org/wiki/Inertia]

On the surface of the Earth the nature of inertia is often masked by the effects of [[friction]], which generally tends to decrease the speed of moving objects (often even to the point of rest), and by the acceleration due to [[gravity]]. The effects of these two forces misled [[classical]] [[theorists]] such as [http://en.wikipedia.org/wiki/Aristotle Aristotle], who believed that objects would move only as long as force was being applied to them.[2][http://en.wikipedia.org/wiki/Inertia]

==Notes==

==Notes==