vector quantity
physical quantity that is a vector
acceleration
rate at which the magnitude and/or direction of velocity changes with time
magnetic flux density
vector physical quantity describing production of a potential difference across a conductor when it is exposed to a varying magnetic field
drag
retarding force on a body moving in a fluid
rolling resistance
force resisting the motion when a body (such as a ball, tire, or wheel) rolls on a surface
particle current density
number of particles per time and area crossing a surface
acceleration of free fall
at a point on Earth, vector sum of gravitational and centrifugal acceleration
magnetic field strength
strength of a magnetic field
magnetic moment
product of the electric current through a loop, the area enclosed by the loop and the unit vector perpendicular to the loop
sound particle velocity
time derivative of the sound particle displacement
sound particle displacement
instantaneous displacement of a particle from its equilibrium position in a medium as it transmits a sound wave
electric field strength
vector physical quantity of electrostatics and electrodynamics
electric flux density
vector field related to displacement current and flux density
polarization density
physical quantity
sound intensity
instantaneous product of sound pressure and particle velocity
Sandcastle
multi-stage pulse in the video signal, usually generated by the horizontal processor and vertical deflection circuit
pop
sixth derivative of the position vector with respect to time; rate of change of the crackle (fifth derivative) with respect to time
angular impulse
time integral of the moment of force
angular momentum
measure of the extent to which an object will continue to rotate in the absence of an applied torque
position vector
vector representing the position of a point with respect to a given origin and axes
electric current density
electric current per area of cross section
vorticity
pseudovector field in continuum mechanics
mass flow
at a point in a fluid, the product of mass density and velocity
rotational velocity
physical quantity defined as the rate of change of number of rotations whose direction is the axis of rotation
Lamb vector
mathematical object used in fluid dynamics
total angular momentum
in a quantum system, vector sum of angular momentum and spin
velocity
rate of change of the position of an object as a function of time, and the direction of that change
gravitational acceleration
acceleration of an object caused by gravity
angular acceleration
rate of change of angular velocity
jerk
rate of change of acceleration
magnetization
physical quantity, density of magnetic moment per volume
magnetic vector potential
vector field whose curl is the magnetic flux density
linear electric current density
physical quantity
force
physical influence that tends to cause an object to change motion unless opposed by other forces
momentum
conserved physical quantity related to the motion of a body
Burgers vector
vector characterising a dislocation in a crystal lattice
wave vector
vector pointing in the direction of a wave and whose magnitude is equal to the wavenumber
sound particle acceleration
instantaneous acceleration of a sound particle
moment of force
vector product of the position vector with respect to the axis of rotation and the force
spin
intrinsic form of angular momentum as a property of quantum particles
angular velocity
physical quantity defined as the rate of change of angular position whose direction is (if regarded as a vector) the axis of rotation
electric dipole moment
vector physical quantity measuring the separation of positive and negative electrical charges within a system
snap
fourth derivative of the position vector with respect to time, or the rate of change of the jerk with respect to time
force density
force per volume
rotational acceleration
rate of change of rotational velocity
torque
tendency of a force to rotate an object
displacement
vector that is the shortest distance from the initial to the final position of a point P
impulse
integral of a force over the time interval for which it acts; term in classical mechanics
magnetic polarization
product of the magnetic constant and the magnetization