| slovo | definícia |
Angular velocity
(gcide) | Velocity \Ve*loc"i*ty\, n.; pl. Velocities. [L. velocitas,
from velox, -ocis, swift, quick; perhaps akin to volare to
fly (see Volatile): cf. F. v['e]locit['e].]
[1913 Webster]
1. Quickness of motion; swiftness; speed; celerity; rapidity;
as, the velocity of wind; the velocity of a planet or
comet in its orbit or course; the velocity of a cannon
ball; the velocity of light.
[1913 Webster]
Note: In such phrases, velocity is more generally used than
celerity. We apply celerity to animals; as, a horse or
an ostrich runs with celerity; but bodies moving in the
air or in ethereal space move with greater or less
velocity, not celerity. This usage is arbitrary, and
perhaps not universal.
[1913 Webster]
2. (Mech.) Rate of motion; the relation of motion to time,
measured by the number of units of space passed over by a
moving body or point in a unit of time, usually the number
of feet passed over in a second. See the Note under
Speed.
[1913 Webster]
Angular velocity. See under Angular.
Initial velocity, the velocity of a moving body at
starting; especially, the velocity of a projectile as it
leaves the mouth of a firearm from which it is discharged.
Relative velocity, the velocity with which a body
approaches or recedes from another body, whether both are
moving or only one.
Uniform velocity, velocity in which the same number of
units of space are described in each successive unit of
time.
Variable velocity, velocity in which the space described
varies from instant to instant, either increasing or
decreasing; -- in the former case called accelerated
velocity, in the latter, retarded velocity; the
acceleration or retardation itself being also either
uniform or variable.
Virtual velocity. See under Virtual.
[1913 Webster]
Note: In variable velocity, the velocity, strictly, at any
given instant, is the rate of motion at that instant,
and is expressed by the units of space, which, if the
velocity at that instant were continued uniform during
a unit of time, would be described in the unit of time;
thus, the velocity of a falling body at a given instant
is the number of feet which, if the motion which the
body has at that instant were continued uniformly for
one second, it would pass through in the second. The
scientific sense of velocity differs from the popular
sense in being applied to all rates of motion, however
slow, while the latter implies more or less rapidity or
quickness of motion.
[1913 Webster]
Syn: Swiftness; celerity; rapidity; fleetness; speed.
[1913 Webster] |
Angular velocity
(gcide) | Angular \An"gu*lar\, a. [L. angularis, fr. angulus angle,
corner. See Angle.]
1. Relating to an angle or to angles; having an angle or
angles; forming an angle or corner; sharp-cornered;
pointed; as, an angular figure.
[1913 Webster]
2. Measured by an angle; as, angular distance.
[1913 Webster]
3. Fig.: Lean; lank; raw-boned; ungraceful; sharp and stiff
in character; as, remarkably angular in his habits and
appearance; an angular female.
[1913 Webster]
Angular aperture, Angular distance. See Aperture,
Distance.
Angular motion, the motion of a body about a fixed point or
fixed axis, as of a planet or pendulum. It is equal to the
angle passed over at the point or axis by a line drawn to
the body.
Angular point, the point at which the sides of the angle
meet; the vertex.
Angular velocity, the ratio of anuglar motion to the time
employed in describing.
[1913 Webster] |
angular velocity
(wn) | angular velocity
n 1: (physics) the rate of change of the angular position of a
rotating body; usually expressed in radians per second or
radians per minute |
| | podobné slovo | definícia |
angular velocity
(wn) | angular velocity
n 1: (physics) the rate of change of the angular position of a
rotating body; usually expressed in radians per second or
radians per minute |
constant angular velocity
(foldoc) | constant angular velocity
(CAV) One of the two schemes for controlling the rate of
rotation of the disk in a disk drive. Constant {angular
velocity} keeps the rate of rotation constant. This means that
the linear velocity of the disk under the head is larger when
reading or writing the outer tracks. This in turn implies
either a variation in the data rate to and from the heads or the
bits per unit length along the track.
The alternative, constant linear velocity, requires the rate of
rotation of the disk to accelerate and decelerate according to the
radial postion of the heads, increasing the energy use and
vibration.
(2014-07-16)
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