law of motion
Definition of law of motion
1
: a statement in dynamics: a body at rest remains at rest and a body in motion remains in uniform motion in a straight line unless acted upon by an external force
— called also
Newton's first law of motion
2
: a statement in dynamics: the acceleration of a body is directly proportional to the applied force and is in the direction of the straight line in which the force acts
— called also
Newton's second law of motion
3
: a statement in dynamics: for every force there is an equal and opposite force or reaction
— called also
Newton's third law of motion
Comments on law of motion
What made you want to look up law of motion? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Find the Cousins
-
- Which pair shares a common word ancestor?
Test your knowledge - and maybe learn something along the way.
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZ
Share law of motion
Resources for law of motion