Ph$$n b$$ l$$i c$$c ngu$$n l$$c

$\backslash$table$[[$Cone wery,,Cine vile tevite,,$],[A,2,.,,3],[B,s,.,,4],[$c$,3,-,$Kgeri,s$,+],[$D$,4,$E$\mathrm{.}8,,1],[$E$,3,$A$.,kg=ar,],[$I$,1,$ED$,Kg=Ha,2,2],[6,3,$E$.$D$,$Egeal.,$4],[$H$,2,0,Kg=1,3,3],[1,3,$F$,Kg=2,3,4],[1,2,$HI$,,1]]$

C$$u h$$i

V$$ s$$ mang l$$i c$$a d$$n$,$ x$$c $$inh $$ng g$$ng v$$ th$$ gian th$$c hi$$n d$$n$.$

V$$ bi$$u $$ ph$$n b$$ ngu$$n l$$c c$$a d$$n theo th$$i gian. T$$ bi$$u $$ h$$y chi r$$ nh$$ng ngu$$n l$$ n$$o bi qu$$ t$$i v$$ ngu$$n l$$c n$$o ch$$a s$$ d$$ng h$$t$.$

L$$p b$$ng t$$ng hopp nhu c$$u c$$c ngu$$n l$$c c$$a d$$n

C$$n $$i l$$i c$$c ngu$$n l$$c c$$a d$$n $$ d$$n kh$$ng b$$ qu$$ t$$i trong vi$$c s$$ d$$ng c$$c ngu$$n l$$c$.$ Sau khi c$$n $$i c$$c ngu$$n l$$c $$ng g$$ng v$$ th$$i gian th$$c hi$$n d$$n c$$ thay $$ kh$$ng$?$