Every body perseveres in its state of being at rest or of moving uniformly straight forward, except insofar as it is compelled to change its state by forces impressed.


The Principia: Mathematical Principles of Natural Philosophy (1687), 3rd edition (1726), trans. I. B. Cohen and Anne Whitman (1999), Axioms, or Laws of Motion, Law 1


Every body perseveres in its state of being at rest or of moving uniformly straight forward, except insofar as it is compelled to change its state by ...

Every body perseveres in its state of being at rest or of moving uniformly straight forward, except insofar as it is compelled to change its state by ...

Every body perseveres in its state of being at rest or of moving uniformly straight forward, except insofar as it is compelled to change its state by ...

Every body perseveres in its state of being at rest or of moving uniformly straight forward, except insofar as it is compelled to change its state by ...