Yog li, cov khoom lag luam tseem hu ua cov khoom lag luam scalar. Algebraically, nws yog tus lej ntawm cov khoom ntawm cov khoom sib txuas ntawm ob ntu ntawm tus lej Geometrically, nws yog cov khoom lag luam ntawm Euclidean qhov loj ntawm ob vectors thiab cosine ntawm lub kaum sab xis ntawm lawv.
Koj pom cov khoom lag luam li cas?
Cov khoom scalar ntawm a thiab b yog: a · b=|a||b| cosθ Peb tuaj yeem nco qab cov qauv no raws li: "Lub modulus ntawm thawj vector, multiplied los ntawm lub modulus ntawm lub thib ob vector, multiplied los ntawm lub cosine ntawm lub kaum sab xis ntawm lawv." b·a=|b||a| cosθ and so a·b=b· a.
Peb siv cov khoom lag luam nyob qhov twg?
Yog a thiab b tsis yog xoom vectors uas a · b=0, ces a thiab b yog perpendicular. Siv cov khoom scalartxhawm rau nrhiav lub kaum sab xis ntawm ob lub vectors Ib qho ntawm cov kev siv ntawm cov khoom scalar yog nrhiav lub kaum sab xis ntawm ob vectors thaum lawv tau hais hauv daim ntawv cartesian.
scalar khoom ntawm cov khoom yog dab tsi?
Hauv kev ua lej, cov khoom lag luam lossis cov khoom lag luam yog kev ua lej lej uas siv ob qhov sib npaug ntawm cov lej (feem ntau ua haujlwm vectors), thiab xa rov qab ib tus lej. … Geometrically, nws yog cov khoom ntawm Euclidean qhov loj ntawm ob vectors thiab cosine ntawm lub kaum sab xis ntawm lawv.
Dab tsi yog cov khoom lag luam ntawm ob lub vectors?
Cov khoom lag luam ntawm ob lub vectors txhais tau tias cov khoom ntawm qhov loj ntawm ob lub vectors thiab cov cosine ntawm cov ces kaum ntawm lawv.
