2025锟斤拷呖锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫╋拷锟揭拷R(sh锟斤拷)锟絚(di锟斤拷n)
2024-08-19 22:55:10锟絎(w锟斤拷ng)锟絡(lu锟斤拷)锟斤拷锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷些锟斤拷要知锟絉(sh锟斤拷)锟絚(di锟斤拷n)
锟絎(xu锟斤拷)锟斤拷(x锟斤拷)锟斤拷锟斤拷锟斤拷锟斤拷r(sh锟斤拷)锟斤拷锟斤拷一些知锟絉(sh锟斤拷)锟絚(di锟斤拷n)锟角达拷冶锟斤拷锟斤拷锟秸碉拷锟斤拷锟斤拷試锟絩(sh锟斤拷)锟斤拷(hu锟斤拷)锟斤拷锟斤拷(f锟斤拷)锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷小锟斤拷锟斤拷锟斤拷锟斤拷锟紷篇锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷些锟斤拷要知锟絉(sh锟斤拷)锟絚(di锟斤拷n)锟斤拷锟斤拷锟杰岋拷(du锟斤拷)锟斤拷锟叫讹拷锟斤拷锟斤拷锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷要知锟絉(sh锟斤拷)锟絚(di锟斤拷n)锟斤拷锟斤拷锟侥合筹拷锟絚锟街斤拷
1.同一直锟斤拷锟斤拷锟斤拷锟侥合筹拷同锟斤拷:F=F1+F2锟斤拷 锟斤拷锟斤拷F=F1-F2 (F1>F2)
2.锟斤拷锟缴角讹拷锟斤拷锟侥合成o拷
F=(F12+F22+2F1F2cosα)1/2(锟斤拷锟揭讹拷锟斤拷) F1⊥F2锟絩(sh锟斤拷):F=(F12+F22)1/2
3.锟斤拷锟斤拷锟斤拷小锟斤拷锟斤拷锟斤拷|F1-F2|≤F≤|F1+F2|
4.锟斤拷锟斤拷锟斤拷锟斤拷锟街解:Fx=Fcosβ锟斤拷F(xi锟斤拷n)y=Fsinβ(β锟斤拷锟斤拷锟斤拷cx锟絊之锟絞锟侥夾锟斤拷tgβ=Fy/Fx)
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷要知锟絉(sh锟斤拷)锟絚(di锟斤拷n)锟斤拷锟絓(y锟斤拷n)锟斤拷(d锟斤拷ng)锟斤拷锟斤拷
1.牛锟紻锟斤拷一锟絓(y锟斤拷n)锟斤拷(d锟斤拷ng)锟斤拷锟斤拷(锟絋锟皆讹拷锟斤拷)锟斤拷锟斤拷锟絯锟斤拷锟叫慣锟皆o拷锟斤拷锟斤拷锟街勶拷锟斤拷直锟斤拷锟絓(y锟斤拷n)锟斤拷(d锟斤拷ng)锟斤拷B(t锟斤拷i)锟斤拷锟給止?f锟斤拷n)锟紹(t锟斤拷i),直锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷變锟紷锟絅锟斤拷B(t锟斤拷i)锟斤拷止
2.牛锟紻锟节讹拷锟絓(y锟斤拷n)锟斤拷(d锟斤拷ng)锟斤拷锟缴o拷F锟斤拷=ma锟斤拷a=F锟斤拷/ma(锟缴猴拷锟斤拷锟斤拷锟絈锟斤拷,锟絚锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷)
3.牛锟紻锟斤拷锟斤拷锟絓(y锟斤拷n)锟斤拷(d锟斤拷ng)锟斤拷锟缴o拷F=-F?(負(f锟斤拷)號(h锟斤拷o)锟斤拷示锟斤拷锟斤拷锟洁反,F锟斤拷F?锟斤拷锟斤拷锟斤拷锟斤拷锟节岋拷(du锟斤拷)锟斤拷锟斤拷平锟斤拷锟斤拷锟絚锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟絕(q锟斤拷)锟絜锟斤拷锟斤拷(sh锟斤拷)锟紿锟斤拷(y锟斤拷ng)锟矫o拷锟斤拷锟絖锟絓(y锟斤拷n)锟斤拷(d锟斤拷ng))
4.锟斤拷锟絚(di锟斤拷n)锟斤拷锟斤拷平锟斤拷F锟斤拷=0锟斤拷锟狡廣 (锟斤拷锟斤拷锟街解法锟斤拷锟斤拷锟斤拷锟絉锟斤拷原锟斤拷)
5.锟斤拷锟截o拷FN>G锟斤拷失锟截o拷FN
6.牛锟紻锟絓(y锟斤拷n)锟斤拷(d锟斤拷ng)锟斤拷锟缴碉拷锟絤锟矫條锟斤拷锟斤拷锟絤锟斤拷锟节斤拷Q锟斤拷锟斤拷锟絓(y锟斤拷n)锟斤拷(d锟斤拷ng)锟斤拷(w锟斤拷n)锟絵锟斤拷锟絤锟斤拷锟节猴拷锟絕锟斤拷锟絯锟斤拷锟斤拷锟絤锟斤拷锟斤拷處锟斤拷锟斤拷锟劫嗭拷(w锟斤拷n)锟絵锟斤拷锟斤拷锟絤锟斤拷锟斤拷微锟絕锟斤拷锟接★拷見(ji锟斤拷n)锟斤拷一锟斤拷(c锟斤拷)P67锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷要知锟絉(sh锟斤拷)锟絚(di锟斤拷n)锟斤拷锟斤拷锟(d锟斤拷ng)锟酵诧拷
1.锟斤拷(ji锟斤拷n)锟紺锟斤拷锟(d锟斤拷ng)F=-kx (F:锟截忥拷(f锟斤拷)锟斤拷锟斤拷k:锟斤拷锟斤拷系锟斤拷(sh锟斤拷)锟斤拷x:位锟斤拷锟斤拷負(f锟斤拷)號(h锟斤拷o)锟斤拷示F锟侥凤拷锟斤拷锟絚x始锟終锟斤拷锟斤拷)
2.锟轿擺锟斤拷锟斤拷T=2π(l/g)1/2 (l:锟絒锟絃(zh锟斤拷ng)(m)锟斤拷g:锟斤拷(d锟斤拷ng)?sh锟斤拷)锟斤拷锟斤拷锟斤拷锟斤拷俣锟街碉拷锟斤拷锟斤拷锟斤拷l锟斤拷:锟絒锟斤拷θ<100;l>>r)
3.锟斤拷锟斤拷锟斤拷锟(d锟斤拷ng)锟絣锟斤拷锟斤拷锟絚(di锟斤拷n)锟斤拷f=f锟(q锟斤拷)锟斤拷(d锟斤拷ng)锟斤拷
4.锟絣(f锟斤拷)锟斤拷锟斤拷锟斤拷l锟斤拷:f锟(q锟斤拷)锟斤拷(d锟斤拷ng)锟斤拷=f锟斤拷锟斤拷A=max锟斤拷锟斤拷锟斤拷姆锟街癸拷蛻锟(y锟斤拷ng)锟矫★拷見(ji锟斤拷n)锟斤拷一锟斤拷(c锟斤拷)P175锟斤拷
5.锟紺(j锟斤拷)械锟斤拷锟斤拷锟組锟斤拷锟斤拷锟絭锟斤拷锟斤拷見(ji锟斤拷n)锟节讹拷锟斤拷(c锟斤拷)P2锟斤拷
6.锟斤拷锟斤拷v=s/t=λf=λ/T(锟斤拷锟斤拷锟斤拷锟絕(gu锟斤拷)锟斤拷锟斤拷锟斤拷一锟斤拷(g锟斤拷)锟斤拷锟斤拷锟斤拷前锟斤拷锟斤拷一锟斤拷(g锟斤拷)锟斤拷锟絃(zh锟斤拷ng);锟斤拷锟劫达拷小锟缴斤拷锟絴(zh锟斤拷)锟斤拷锟斤拷锟斤拷锟絈锟斤拷)
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷要知锟絉(sh锟斤拷)锟絚(di锟斤拷n)锟斤拷锟絖锟斤拷锟絚锟斤拷(d锟斤拷ng)锟斤拷
1.锟斤拷(d锟斤拷ng)锟斤拷锟斤拷p=mv (p:锟斤拷(d锟斤拷ng)锟斤拷(kg/s)锟斤拷m:锟絴(zh锟斤拷)锟斤拷(kg)锟斤拷v:锟劫讹拷(m/s)锟斤拷锟斤拷锟斤拷锟絚锟劫度凤拷锟斤拷锟斤拷同)
3.锟絖锟斤拷锟斤拷I=Ft (I:锟絖锟斤拷(N?s)锟斤拷F(xi锟斤拷n):锟斤拷锟斤拷(N)锟斤拷t:锟斤拷锟斤拷锟斤拷锟矫時(sh锟斤拷)锟絞(s)锟斤拷锟斤拷锟斤拷锟斤拷F锟絈锟斤拷)
4.锟斤拷(d锟斤拷ng)锟斤拷锟斤拷锟斤拷锟斤拷I=Δp锟斤拷Ft=mvt–mvo (Δp:锟斤拷(d锟斤拷ng)锟斤拷變锟斤拷Δp=mvt–mvo锟斤拷锟斤拷矢锟斤拷式)
5.锟斤拷(d锟斤拷ng)锟斤拷锟截恒定锟缴o拷p前锟斤拷=p锟襟總伙拷p=p’?也锟斤拷锟斤拷锟斤拷m1v1+m2v2=m1v1?+m2v2?
锟斤拷锟絇(gu锟斤拷n)锟斤拷锟絔锟斤拷
锟斤拷锟斤拷锟竭匡拷锟斤拷锟斤拷锟(f锟斤拷)锟斤拷(x锟斤拷)锟斤拷锟斤拷
锟斤拷锟铰高匡拷锟結訊锟斤拷锟竭匡拷锟斤拷锟斤拷锟斤拷锟斤拷前锟斤拷(zh锟斤拷n)锟斤拷锟斤拷志愿锟斤拷锟(b锟斤拷o)锟斤拷锟饺★拷锟?j锟斤拷n)?sh锟斤拷)锟斤拷锟斤拷
锟竭匡拷锟絩(sh锟斤拷)锟絞锟斤拷锟斤拷全锟斤拷锟斤拷要锟斤拷(ji锟斤拷)锟絚(di锟斤拷n)
锟組锟斤拷"锟竭匡拷锟絎(w锟斤拷ng)"微锟脚癸拷锟斤拷號(h锟斤拷o)