Isantya

Isantya ngumgama ohanjwa yinto ngexesha elithile nelibekiweyo. Isantya ngumlinganiselo obonakalisa okokuba ingaba into ihamba ngokukhawuleza kangakanani na.  Umyinge wokuhamba kwesantya sento ngelo xesha limisiweyo ngumgama ohamjwa yiloo nto uze  ducukucezwe okanye wohlulwahlulwe ngexesha.

Isantya sifumaneka ngo-${\displaystyle s}$,

${\displaystyle s=}$${\displaystyle d \over t}$

apho ke u-${\displaystyle d}$ ungumgama aze yena u-${\displaystyle t}$ abelixesha elichithiweyo. 

Zininzi ii-units zomlinganiselo wesantya. Umzekelo, isantya sokuhamba kwento singalinganiswa ngee

• imayile ngeyure (mph),
• khilomitha  ngeyure (km/h)
• mitha ngomzuzwana (m/s), noyi-SI-unit yesantya.

Xa into itshintsha isantya, ihamba ngokukhawuleza okanye chu kancinane.Ukuba siyanda isantya sento ethile, kuthiwa xa ibizwa yi-acceleration. Ukuba into iya ihamba kancinane, size isantya sinciphe, ibizwa ngokuba yideceleration, okanye i-negative acceleration.

• I-Velocity
• I-Momentum
• I-Quantum mechanics
• I-Metric system