different between swiftness vs acceleration

English

Etymology

From Middle English swiftnesse, swyftnesse, from Old English swiftnes (“swiftness”), equivalent to swift +? -ness.

Pronunciation

• IPA^(key): /?sw?ftn?s/
• Hyphenation: swift?ness

Noun

swiftness (usually uncountable, plural swiftnesses)

1. The state of being swift.

Synonyms

• celerity
• haste
• rapidity

Translations

English

Alternative forms

• acc.
• a.

Etymology

First attested in 1531. From French accélération or more likely directly from Latin acceler?ti? (“a hastening, acceleration”). Equivalent to accelerate +? -ion.

Pronunciation

• enPR: ?ks?l?r?'sh?n, IPA^(key): /?k.?s?l.?.??e?.??n/, /æk.?s?l.?.??e?.??n/, /?k.?s?l.?.??e?.??n/
• Rhymes: -e???n

Noun

acceleration (countable and uncountable, plural accelerations)

1. (uncountable) The act of accelerating, or the state of being accelerated; increase of motion or action; as opposed to retardation or deceleration.

2. (countable) The amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity).
3. (physics) The change of velocity with respect to time (can include deceleration or changing direction).
4. The advancement of students at a rate that places them ahead of where they would be in the regular school curriculum.

Usage notes

Acceleration in SI units is measured in metres per second per second (m/s²), or in imperial units in feet per second per second (ft/s²).

Antonyms

• (act or state, amount): deceleration, retardation

Translations

See also

• displacement
• velocity
• jerk

References

Interlingua

Noun

acceleration (plural accelerationes)

1. acceleration

Swedish

Etymology

accelerera +? -tion

Noun

acceleration c

1. acceleration; a change in velocity

Declension