# speed

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## speed,

change in distance with respect to time. Speed is a scalar rather than a vectorvector,
quantity having both magnitude and direction; it may be represented by a directed line segment. Many physical quantities are vectors, e.g., force, velocity, and momentum.
quantity; i.e., the speed of a body tells one how fast the body is moving but not the direction of the motion. If during time t a body travels over a distance s, then the average speed of that body is equal to s/t. The speed and direction of a body's motion together determine the body's velocityvelocity,
change in displacement with respect to time. Displacement is the vector counterpart of distance, having both magnitude and direction. Velocity is therefore also a vector quantity. The magnitude of velocity is known as the speed of a body.
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## Speed

The time rate of change of position of a body without regard to direction. It is the numerical magnitude only of a velocity and hence is a scalar quantity. Linear speed is commonly measured in such units as meters per second, miles per hour, or feet per second.

Average linear speed is the ratio of the length of the path traversed by a body to the elapsed time during which the body moved through that path. Instantaneous speed is the limiting value of the foregoing ratio as the elapsed time approaches zero. See Velocity

## speed

[spēd]
(graphic arts)
The sensitivity of a photographic film, expressed according to one of several scales.
(mechanics)
The time rate of change of position of a body without regard to direction; in other words, the magnitude of the velocity vector.
(optics)
The light-gathering power of a lens, expressed as the reciprocal of the f number.
The time that a camera shutter is open.
(physics)
In general, the rapidity with which a process takes place.

## Speed

an “illiterate loiterer”; slow-moving servant. [Br. Lit.: Two Gentlemen of Verona]

## speed

1. Physics
a. a scalar measure of the rate of movement of a body expressed either as the distance travelled divided by the time taken (average speed) or the rate of change of position with respect to time at a particular point (instantaneous speed). It is measured in metres per second, miles per hour, etc.
b. (not in technical usage) another word for velocity
2. a rate of rotation, usually expressed in revolutions per unit time
3. a gear ratio in a motor vehicle, bicycle, etc.
4. Photog a numerical expression of the sensitivity to light of a particular type of film, paper, or plate
5. Photog a measure of the ability of a lens to pass light from an object to the image position, determined by the aperture and also the transmitting power of the lens. It increases as the f-number is decreased and vice versa
6. a slang word for amphetamine

## SPEED

Early system on LGP-30. Listed in CACM 2(5):16 (May 1959).
References in periodicals archive ?
Unwanted Above, the speed bumps in Bridgend, inset one of the bolts
"As far as I can make out, they all came off at the speed bumps or just after," she said.
During the 90-day review period, DMO staff conducted an analysis of the legal and policy implications of the ICE Rule, met with several market participants, and studied speed bumps in other markets.
Tim Shallcross, Welsh policy officer at the Institute of Advanced Motorists, said he would be fascinated to see the results of before and after monitoring of painted speed bumps.
Speed bumps can also cause structural damage - as the impact of vehicles going over the bump sends shockwaves through the ground.
Dave's real philosophy seems to be "anything to get a laugh," and in the case of Speed Bump: Cartoons for Idea People, it's one of those rare philosophies that actually works 99 percent of the time.
There is one story of a plow being stopped by a speed bump (hump), but no report of harm done to either participant.
I WISH to comment on the ever-increasing number of speed bumps that are being installed in Cardiff, which already has far more than comparable cities.
Another witness, Francis Njoroge, said the speed bumps erected along the well-known black spot were a danger to motorists.We have complained several times about the bumps which are the main cause of accidents along the stretch, he claimed.
The speed bump and 20mph zone have had a noticeable effect, added Cllr Rose.
A speed bump table is a wider strip of pavement than a customary speed bump.
Patients were classed as "speed bump positive" if they had a worsening of pain whilst travelling over speed bumps or "speed bump negative" if their pain stayed the same, if they were unsure, or if their pain improved.

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