Specialist dictionary

Mechanics

Motion, forces, energy and physical systems.

Core vocabulary

120 featured terms

The database can contain more terms than shown here; this page prioritises the strongest mappings.

Powernoun

(physics) the rate of doing work; measured in watts (= joules/second)

Angular accelerationnoun

(physics) the rate of change of the angular velocity of a rotating body

Angular velocitynoun

(physics) the rate of change of the angular position of a rotating body; usually expressed in radians per second or radians per minute

Center of massnoun

point representing the mean position of the matter in a body

Centre of massnoun

point representing the mean position of the matter in a body

K.E.noun

the mechanical energy that a body has by virtue of its motion

kinetic energynoun

the mechanical energy that a body has by virtue of its motion

P.E.noun

the mechanical energy that a body has by virtue of its position; stored energy

potential energynoun

the mechanical energy that a body has by virtue of its position; stored energy

Torquenoun

a twisting force

Torsionnoun

a twisting force

Accelerationnoun

(physics) a rate of increase of velocity

Energynoun

(physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs; "energy c…

Forcenoun

(physics) the influence that produces a change in a physical quantity; "force equals mass times acceleration"

Free energynoun

(physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs; "energy c…

Gravitationnoun

(physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface;…

Gravitational attractionnoun

(physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface;…

Gravitational forcenoun

(physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface;…

Gravitynoun

(physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface;…

Inertianoun

(physics) the tendency of a body to maintain its state of rest or uniform motion unless acted upon by an external force

Worknoun

(physics) a manifestation of energy; the transfer of energy from one physical system to another expressed as the product of a force and the dist…

conservation lawnoun

A rule that a quantity such as energy or momentum is not lost in a closed system.

kinetic energynoun

Energy an object has because it is moving.

potential energynoun

Stored energy associated with position or arrangement.

Electric powernoun

the product of voltage and current

Electrical powernoun

the product of voltage and current

Mechanical powernoun

the time derivative of work.

Waterpowernoun

the power to do work that is latent in a head of water

Wattagenoun

the product of voltage and current

Barycenternoun

(astronomy) the common center of mass around which two or more bodies revolve

Center of buoyancynoun

(physics) the center of mass of the immersed part of ship or other floating object

Center of immersionnoun

(physics) the center of mass of the immersed part of ship or other floating object

Centre of buoyancynoun

(physics) the center of mass of the immersed part of ship or other floating object

Centre of immersionnoun

(physics) the center of mass of the immersed part of ship or other floating object

Centroidnoun

the center of mass of an object of uniform density

Elastic energynoun

potential energy that is stored when a body is deformed (as in a coiled spring)

Elastic potential energynoun

potential energy that is stored when a body is deformed (as in a coiled spring)

Magnetic energynoun

(physics) the potential energy of a magnetic field.

Magnetic momentnoun

the torque exerted on a magnet or dipole when it is placed in a magnetic field

Moment of a magnetnoun

the torque exerted on a magnet or dipole when it is placed in a magnetic field

Weightnoun

the vertical force exerted by a mass as a result of gravity

Impulsenoun

an impelling force or strength; "the car's momentum carried it off the road"

Momentnoun

a turning force produced by an object acting at a distance (or a measure of that force)

Momentumnoun

an impelling force or strength; "the car's momentum carried it off the road"

Speednoun

distance travelled per unit time

Velocitynoun

distance travelled per unit time

activation energynoun

the energy that an atomic system must acquire before a process (such as an emission or reaction) can occur; "catalysts are said to reduce the en…

Aerodynamic forcenoun

forces acting on airfoils in motion relative to the air (or other gaseous fluids)

Affinitynoun

the force attracting atoms to each other and binding them together in a molecule; "basic dyes have an affinity for wool and silk"

Alternative energynoun

energy derived from sources that do not use up natural resources or harm the environment

Atomic energynoun

the energy released by a nuclear reaction

Attractionnoun

the force by which one object attracts another

Attractive forcenoun

the force by which one object attracts another

Binding energynoun

the energy required to separate particles from a molecule or atom or nucleus; equals the mass defect

Centrifugal forcenoun

the outward force on a body moving in a curved path around another body

Centripetal accelerationnoun

the acceleration toward the center that holds a satellite in elliptical orbit

Centripetal forcenoun

the inward force on a body moving in a curved path around another body

Chemical attractionnoun

the force attracting atoms to each other and binding them together in a molecule; "basic dyes have an affinity for wool and silk"

Chemical energynoun

that part of the energy in a substance that can be released by a chemical reaction

Cohesionnoun

(physics) the intermolecular force that holds together the molecules in a solid or liquid

Constant accelerationnoun

a type of motion in which the velocity of an object changes by an equal amount in every equal time period.; "In this case, the constant accelera…

Coriolis forcenoun

(physics) a force due to the earth's rotation; acts on a body in motion (airplane or projectile) in a rotating reference frame; in a rotating fr…

Dissociation energynoun

the energy needed to break every chemical bond in a molecule and completely separate all its atoms.

Driftnoun

a force that moves something along

Elan vitalnoun

(biology) a hypothetical force (not physical or chemical) once thought by Henri Bergson to cause the evolution and development of organisms

Electric energynoun

(physics) the potential energy of an electric charge in an electric field, or of an electric current in a magnetic field.

Electrical energynoun

energy made available by the flow of electric charge through a conductor; "they built a car that runs on electricity"; "The power went out aroun…

Electricitynoun

energy made available by the flow of electric charge through a conductor; "they built a car that runs on electricity"; "The power went out aroun…

Energy levelnoun

a definite stable energy that a physical system can have; used especially of the state of electrons in atoms or molecules; "according to quantum…

Energy of activationnoun

the energy that an atomic system must acquire before a process (such as an emission or reaction) can occur; "catalysts are said to reduce the en…

Energy statenoun

a definite stable energy that a physical system can have; used especially of the state of electrons in atoms or molecules; "according to quantum…

Exchange energynoun

the energy involved in the exchange interaction.; "Exchange energy splittings are very elusive to calculate for molecular systems at large inter…

Heatnoun

a form of energy that is transferred by a difference in temperature

Heat energynoun

a form of energy that is transferred by a difference in temperature

Impetusnoun

a force that moves something along

Impulsionnoun

a force that moves something along

Life forcenoun

(biology) a hypothetical force (not physical or chemical) once thought by Henri Bergson to cause the evolution and development of organisms

Lorentz forcenoun

the force experienced by a point charge moving along a wire that is in a magnetic field; the force is at right angles to both the current and th…

Magnetomotive forcenoun

the force that produces magnetic flux

Mechanical energynoun

energy in a mechanical form

Moment of inertianoun

the tendency of a body to resist angular acceleration

Nuclear energynoun

the energy released by a nuclear reaction

Powernoun

energy made available by the flow of electric charge through a conductor; "they built a car that runs on electricity"; "The power went out aroun…

Propulsionnoun

a propelling force

Pullnoun

the force used in pulling; "the pull of the moon"; "the pull of the current"

Pushnoun

the force used in pushing; "the push of the water on the walls of the tank"; "the thrust of the jet engines"

Radiant energynoun

energy that is transmitted in the form of (electromagnetic) radiation; energy that exists in the absence of matter

Radiationnoun

energy that is radiated or transmitted in the form of rays or waves or particles

Reactionnoun

(mechanics) the equal and opposite force that is produced when any force is applied to a body; "every action has an equal and opposite reaction"

Repulsionnoun

the force by which bodies repel one another

Repulsive forcenoun

the force by which bodies repel one another

Rest energynoun

the energy equivalent to the mass of a particle at rest in an inertial frame of reference; equal to the rest mass times the square of the speed…

Separation energynoun

the energy required to separate particles from a molecule or atom or nucleus; equals the mass defect

Solar gravitynoun

the gravity of the sun; "solar gravity creates extreme pressures and temperatures"

Stressnoun

(physics) force that produces strain on a physical body; "the intensity of stress is expressed in units of force divided by units of area"

Thrustnoun

the force used in pushing; "the push of the water on the walls of the tank"; "the thrust of the jet engines"

Uniform accelerationnoun

a type of motion in which the velocity of an object changes by an equal amount in every equal time period.; "In this case, the constant accelera…

Vital forcenoun

(biology) a hypothetical force (not physical or chemical) once thought by Henri Bergson to cause the evolution and development of organisms

Vitalitynoun

(biology) a hypothetical force (not physical or chemical) once thought by Henri Bergson to cause the evolution and development of organisms

Loadnoun

the power output of a generator or power plant

Heavinessnoun

the property of being comparatively great in weight; "the heaviness of lead"

Lightnessnoun

the property of being comparatively small in weight; "the lightness of balsa wood"

Poundagenoun

weight expressed in pounds

Tarenoun

the weight of a motor vehicle, railroad car, or aircraft without its fuel or cargo

Weightinessnoun

the property of being comparatively great in weight; "the heaviness of lead"

Light speednoun

the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 29…

Speed of lightnoun

the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 29…

Steeragewaynoun

(nautical) the minimum rate of motion needed for a vessel to be maneuvered

ACnoun

an electric current that reverses direction sinusoidally; "In the US most household current is AC at 60 cycles per second"

Affinitynoun

(immunology) the attraction between an antigen and an antibody

Alternating currentnoun

an electric current that reverses direction sinusoidally; "In the US most household current is AC at 60 cycles per second"

Alternating electric currentnoun

an electric current that reverses direction sinusoidally; "In the US most household current is AC at 60 cycles per second"

Bondnoun

an electrical force linking atoms

Breaking pointnoun

the degree of tension or stress at which something breaks

DCnoun

an electric current that flows in one direction steadily

Direct currentnoun

an electric current that flows in one direction steadily

Direct electric currentnoun

an electric current that flows in one direction steadily

Heat of transformationnoun

heat absorbed or radiated during a change of phase at a constant temperature and pressure

Latent heatnoun

heat absorbed or radiated during a change of phase at a constant temperature and pressure

Liftnoun

the component of the aerodynamic forces acting on an airfoil that opposes gravity