Changes

[[Isaac Newton]]'s 3 laws of motion form the basis for [[classical mechanics]].  They are:

[[Isaac Newton]]'s 3 laws of motion form the basis for [[classical mechanics]].  They are:

1) An object in motion will remain in motion unless acted upon by an outside force.  An object at rest will remain at rest unless acted upon by an outside force.

1) An object in motion will remain in motion unless acted upon by an external force.  An object at rest will remain at rest unless acted upon by an external force.

2) The rate of change of an object's [[momentum]] is equal to the net force acting on it (<math>F = dp/dt </math>, sometimes written as <math>F = m*a</math>).

2) The rate of change of an object's [[momentum]] is equal to the net force acting on it (<math>F = dp/dt </math>, sometimes written as <math>F = m*a</math> when mass can be assumed to be constant).

3) For every action there is an equal and opposite reaction; or, more precisely, the total momentum of any isolated system is always constant.

3) For every action there is an equal and opposite reaction; or, more precisely, the total momentum of any isolated system is always constant.