Newton's First Law Quotes

An object in motion tends to remain in motion along a straight line unless acted upon by an outside force.

A moving body whose motion was not retarded by any resisting force would continue to move to all eternity.

The natural law of inertia: Matter will remain at rest or continue in uniform motion in the same straight line unless acted upon by some external force.

If your position is everywhere, your momentum is zero.

Every body continues in its state of rest or uniform motion in a straight line, except insofar as it doesn't.

Impressed force is the action exerted on a body to change its state either of resting or of moving uniformly straight forward.

A point of rest alone explains motion.

Every body persists in a state of rest or of uniform motion in a straight line, unless it is compelled to change that state by forces having impact upon it.

Definition of inertia: 'The vis insita, or innate force of matter, is a power of resisting by which every body, as much as in it lies, endeavours to preserve its present state, whether it be of rest or of moving uniformly forward in a straight line.

The alternation of motion is ever proportional to the motive force impressed; and is made in the direction of the right line in which that force is impressed.

As three laws were good enough for Newton, I have modestly decided to stop there.

For the elements have the property of moving back to their place in a straight line, but they have no properties which would cause them to remain where they are, or to move otherwise than in a straight line. The rectilinear motions of these four elements when returning to their original place are of two kinds, either centrifugal, viz., the motion of the air and the fire; or centripedal, viz., the motion of the earth, and the water; and when the elements have reached their original place, they remain at rest.