velocity
rate of change of the position of an object as a function of time, and the direction of that change
peculiar velocity
velocity of an object relative to a rest frame
four-velocity
analogue of velocity in four-dimensional spacetime
relative velocity
velocity of an object or observer B in the rest frame of another object or observer A
design speed
tool to determine geometric features of a new road
flow velocity
vector field which is used to mathematically describe the motion of a continuum
bulk velocity
average flow velocity
sound particle velocity
time derivative of the sound particle displacement
terminal velocity
highest velocity attainable by an object as it falls through a fluid
rest
velocity of zero in a given reference frame
orbital speed
speed at which it orbits around the barycenter of a system, usually around a more massive body. It can be used to refer to either the mean orbital speed, i.e. the average speed as it completes an orbit, or the speed at a particular point in its orbit
transonic
flight condition in which airflow speeds are concurrently above and below the speed of sound
cosmic velocity
term for minimum speeds needed to overcome gravity relative to a primary body
group velocity
physical quantity
advisory speed
unofficial but encouraged safe speed where a statutory speed limit is not posted
reaction time
period taken for subject to respond to a stimulus
drift velocity
average velocity attained by charged particles in a material due to electric field
phase velocity
rate at which the phase of the wave propagates in space
tempo
musical concept indicating to the speed of interpretation
hull speed
speed at which the wavelength of a vessel's bow wave is equal to the waterline length
faster-than-light
propagation of information or matter faster than the speed of light
radial velocity
component of the velocity in radial direction
explosive velocity
characteristic of explosions