Ua haujlwm, hauv physics, ntsuas ntawm lub zog hloov pauv uas tshwm sim thaum ib qho khoom txav mus rau qhov deb los ntawm lub zog sab nraud yam tsawg kawg yog ib feem ntawm uas yog siv rau hauv kev coj ntawm hloov chaw. … Yog hais tias lub zog raug quab yuam ntawm ib lub kaum sab xis θ mus rau qhov kev hloov pauv, qhov ua tiav yog W=fd cos θ.
piv txwv ua haujlwm physics yog dab tsi?
Lub SI chav haujlwm yog Joule (J). Piv txwv li, yog hais tias ib tug quab yuam ntawm 5 newtons yog siv rau ib yam khoom thiab txav 2 meters, cov hauj lwm ua tiav yuav yog 10 newton-meter los yog 10 Joule.
Puas ua haujlwm tib yam li lub zog?
Kev ua haujlwm yog lub peev xwm los muab lub zog thiab hloov pauv ntawm qhov deb ntawm qhov khoom. Zoo yog lub peev xwm los muab lossis tsim ua haujlwm.
Yuav ua li cas hauv physics chav kawm 9?
• Ua hauj lwm tiav ntawm ib yam khoom txhais tau tias yog qhov loj ntawm lub zog sib npaug los ntawm qhov kev ncua deb txav los ntawm cov khoom nyob rau hauv kev coj ntawm kev siv quab yuam. Ua haujlwm tiav=quab yuam × nrug.=F × s.
Puas ua haujlwm yog scalar lossis vector?
Kev ua haujlwm tsis yog vector kom muaj nuj nqis, tab sis a scalar quantity. Qhov no begs cov lus nug txog vim li cas yog ib qho + lossis - kos npe siv thaum qhia txog kev ua haujlwm? Kev ua haujlwm uas zoo (+) yog qhov tshwm sim ntawm lub zog uas txhawb nqa lub zog rau ib yam khoom raws li nws ua haujlwm rau nws.
