Newton's laws of motion

Also found in: Dictionary, Thesaurus, Legal, Encyclopedia, Wikipedia.
Related to Newton's laws of motion: Newton's first law of motion

Newton's laws of motion

three laws that relate the forces and motions of bodies or objects (from the viewpoint of a fixed observer), first proposed by Isaac Newton. (1) An object will remain at rest or continue with constant velocity unless acted on by an unbalanced force. (2) The rate of change of momentum (or acceleration for a body/object of constant mass) is proportional to, and in the same direction as, the force applied to it (force = mass ×1 acceleration). (3) When two objects are in contact, the force applied by one object on the other is equal and opposite to that of the second object on the first (for every action, there is an equal and opposite reaction).


principle or rule
  • Davis' law soft tissues' tendency to shorten and contract unless subject to frequent stretching

  • Hilton's law a joint and its motive muscles (+ insertions) are all supplied by the same nerve

  • Hook's law tissue strain (i.e. change in length) is directly proportional to applied compressive or stretching stress, so long as tissue elasticity (recoil ability) is not exceeded

  • inverse-square law radiation intensity is inversely proportional to square of distance from radiation source (rad = κ1/cm2)

  • law of excitation muscle tissue contracts in direct proportion to stimulating current strength

  • Newton's first law; law of inertia an object at rest will not move until acted upon by a force; an object in motion will remain in motion at constant velocity until acted on by a net force

  • Newton's second law; law of acceleration acceleration is directly proportional to applied force and indirectly proportional to object mass (i.e. force = mass × acceleration)

  • Newton's third law; law of reciprocal actions to every action there is an equal and opposite reaction; i.e. a body is maintained at rest by equal and opposing forces

  • Pascal's law a fluid at rest transmits pressure equally in every direction

  • Poiseuille's law vascular blood flow is inversely proportional to fourth power of vessel radius (i.e. the narrower the vessel, the greater the resistance to flow)

  • Starling's law the greater the stretch imposed on a circular muscle (e.g. muscle layer of an artery), the greater its reciprocal recoil and contraction

  • Wolff's law bone function changes cause bone structure modification (see bone modelling)

Mentioned in ?
References in periodicals archive ?
features high-energy actors, music, videos, and demonstrations to teach Newton's laws of motion and the process of scientific inquiry.
To attract these potential customers, be sure to include Newton's laws of motion in the advertisement copy.
Principia Mathematica by Sir Isaac Newton (1687) - Often held to represent the peak of the scientific revolution, it includes Newton's Laws of Motion.
I then compare the laws of motion based on power to Newton's Laws of Motion and I investigate the relation of power to Leibniz's notion of vis viva.
For example, in her comments on an excerpt from Halley's paper "A Synopsis of the Astronomy of Comets" she describes Halley's calculations of a comet's orbit based on Newton's laws of motion and gravity.
It can make science more interesting in a classroom environment where it is useful for physics teachers when teaching their students Newton's laws of motion.
124-8) to Lord Kames in which he explicates Newton's laws of motion with such uncommon clarity and analytical rigor.
A lighthearted look at the relationship between Newton's laws of motion and the way change occurs in nursing is provided.
Even brilliant developments such as Newton's laws of motion and Einstein's theory of relativity fall into this category.
The principles of our discipline are Newton's laws of motion.
Both Newtonian treatises shaped the assumptions of the Enlightenment, though the Principia needed to be popularised by Voltaire, while Newton's laws of motion were often misunderstood.