Yuav ua li cas koj thiaj paub tias angular momentum yog kev txuag?
Yuav ua li cas koj thiaj paub tias angular momentum yog kev txuag?

Video: Yuav ua li cas koj thiaj paub tias angular momentum yog kev txuag?

Video: Yuav ua li cas koj thiaj paub tias angular momentum yog kev txuag?
Video: Yuav ua cas thiaj paub tias "Nws Hlub Koj" 2024, Kaum ib hlis
Anonim

Ib yam li linear momentum yog kev txuag thaum tsis muaj zog sab nraud, angular zog yog tas li los yog khaws tseg thaum net torque yog xoom. Yog kev hloov hauv angular zog ΔL yog xoom, ces tus angular zog yog tas li; yog li ntawd, → L = tsis tu ncua L → = tsis tu ncua ( thaum net t = 0).

Tom qab ntawd, nws txhais li cas rau lub zog angular kom txuag tau?

Hauv physics, angular zog (tsis tshua muaj, lub sijhawm ntawm lub zog los yog rotational lub zog ) yog qhov sib npaug sib npaug ntawm linear lub zog . Nws yog ib qho tseem ceeb kom muaj nuj nqis hauv physics vim nws yog ib khaws cia kom muaj nuj nqis - tag nrho angular zog ntawm lub kaw lus kaw tseem nyob tas li.

Qhov thib ob, yog angular momentum txuag nrog kev sib txhuam? 2 Teb. Cov angular zog ntawm txhua disk tus kheej tsis yog khaws cia , txawm li cas los xij angular zog ntawm ob lub disks yog khaws cia vim tias tsis muaj torques sab nraud ua haujlwm. Muaj cov rog sab hauv, uas yog qhov no, kev sib txhuam , tab sis qhov ntawd tsis muaj teeb meem.

Qhov sib thooj, puas yog lub zog angular ib txwm khaws cia?

Momentum yog vector, taw tes rau tib txoj kev raws li qhov tshaj tawm. Angular zog muaj lub cim L, thiab muab los ntawm kab zauv: tib yam li linear lub zog yog ib txwm khaws cia thaum tsis muaj lub zog ua haujlwm, angular zog yog khaws cia thaum tsis muaj net torque.

Yuav ua li cas yog hais tias lub angular momentum tsis tau khaws cia?

Angular zog yog khaws tseg thaum net sab nraud torque ua rau lub cev lossis lub cev yog xoom. Yog li, cov angular zog yuav yog khaws cia . Qhov sib txawv yog muaj qee qhov tsis xoom sab nraud torque ua piv txwv yog muaj kev sib txhuam ntawm lub log rotating thiab hauv av angular zog yuav tsis yog ua khaws cia.

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