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 ?
Directions: Define each of Newton's Laws of Motion.
But Newton's Laws of Motion help explain the science behind Olson's outrageous snowboard tricks.
Baraff's computer program uses Newton's laws of motion to define the trajectories of moving objects and relies on special, newly developed mathematical methods for calculating the forces between objects that touch or collide.
The equations expressing Newton's laws of motion provide a remarkably successful means for describing the movements of objects ranging from stars and planets to baseballs and dust particles.
The two-day workshop program entitled, Experiencing Newton's Laws of Motion, equips teachers with hands-on activities, space flight simulation experiences, and take-home material all aimed at enhancing STEM (science, technology, engineering and mathematics) education in their classrooms.
According to Newton's laws of motion, the axis of such a gyroscope should always stay pointed in the same direction.
The program provides educators with a once-in-a-lifetime opportunity to prepare for and participate in micro- and zero-gravity flights during which they test Newton's Laws of Motion with a variety of planned experiments.
The model incorporates Newton's laws of motion, star formation and evaporation, the effects of stellar winds and starlight in heating up and pushing around interstellar gas, and the cooling of interstellar gas by the emission of infrared radiation.
By combining technology, 3-D capabilities and multimedia, students, teachers and scientists will be able to realistically experience the launching of a rocket to Mars and the use of Newton's laws of motion to control satellites and determine how and when to use solar panels.
Wolf has come up with two equations, based on Newton's laws of motion, that describe the toy's behavior.
and Russian spacesuits; demonstrated how materials are recycled on orbit; and how the principles of Newton's Laws of Motion affect life and work in the absence of gravity.