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X¼´Êý¸þ¤Î®ÅÙ:Vx
X¼´Êý¸þ¤Î²Ã®ÅÙ:Ax
Y¼´Êý¸þ¤Î®ÅÙ:Vy
Y¼´Êý¸þ¤Î²Ã®ÅÙ:Ay
ʪÂΤξì½ê:(x,y)=(rcos¦Õ,rsin¦Õ)

m[dVx/dt]=fx=f(r)cos¦Õ
m[dVy/dt]=fy=f(r)sin¦Õ

Vx=dx/dt=r'cos¦Õ-r¦Õ'sin¦Õ
Vy=dy/dt=r'sin¦Õ+r¦Õ'cos¦Õ

Ax=dVx/dt
Ax=r''cos¦Õ-r'¦Õ'sin¦Õ-r'(¦Õ'sin¦Õ)-r(¦Õ'sin¦Õ)'
Ax=r''cos¦Õ-r'¦Õ'sin¦Õ-r'(¦Õ'sin¦Õ)-r(¦Õ''sin¦Õ+(¦Õ')2cos¦Õ)
Ax=r''cos¦Õ-r'¦Õ'sin¦Õ-r'¦Õ'sin¦Õ-r'¦Õ'sin¦Õ-r(¦Õ')2cos¦Õ
Ax=r''cos¦Õ-2r'¦Õ'sin¦Õ-r'¦Õ'sin¦Õ-r(¦Õ')2cos¦Õ

Ay=dVy/dt
Ay=r''sin¦Õ+r'¦Õ'cos¦Õ+r'(¦Õ'cos¦Õ)+r(¦Õ'cos¦Õ)
Ay=r''sin¦Õ+r'¦Õ'cos¦Õ+r'¦Õ'cos¦Õ+r(¦Õ''cos¦Õ-(¦Õ')2sin¦Õ)
Ay=r''sin¦Õ+r'¦Õ'cos¦Õ+r'¦Õ'cos¦Õ+r'¦Õ'cos¦Õ-r(¦Õ')2sin¦Õ
Ay=r''sin¦Õ+2r'¦Õ'cos¦Õ+r'¦Õ'cos¦Õ-r(¦Õ')2sin¦Õ

m[dVx/dt]=fx=f(r)cos¦Õ
m[dVy/dt]=fy=f(r)sin¦Õ
cos¦Õ+sin¦Õ=m(cos¦ÕdVx/dt+sin¦ÕdVy/dt)
Ax=dVx/dt
Ay=dVy/dt
cos¦Õ+sin¦Õ=m(cos¦ÕAx+sin¦ÕAy)
cos¦Õ+sin¦Õ=(sin2¦Õ+cos2¦Õ)f(r)
cos¦Õ+sin¦Õ=f(r)cos¦ÕdVx/dt+sin¦ÕdVy/dt=f(r)/m

sin¦Õ-cos¦Õ=m(sin¦ÕdVx/dt+cos¦ÕdVy/dt)
sin¦Õ-cos¦Õ=cos¦Õsin¦Õf(r)-sin¦Õcos¦Õf(r)=0

cos¦Õ{r''cos¦Õ-2r'¦Õ'sin¦Õ-r'¦Õ'sin¦Õ-r(¦Õ')2cos¦Õ}+
sin¦Õ{r''sin¦Õ+2r'¦Õ'cos¦Õ+
r'¦Õ'cos¦Õ-r(¦Õ')2sin¦Õ}=r''-r(¦Õ')2=f(r)/m
m{r''-r(¦Õ')2}=f(r)

sin¦Õ{r''cos¦Õ-2r'¦Õ'sin¦Õ-r'¦Õ'sin¦Õ-r(¦Õ')2cos¦Õ}
[-cos¦Õ]{r''sin¦Õ+2r'¦Õ'cos¦Õ+
r'¦Õ'cos¦Õ-r(¦Õ')2sin¦Õ}
=2r'¦Õ'+r¦Õ''=0
m(2r'¦Õ'+r¦Õ'')=0

m{r''-r(¦Õ')2}=f(r)
m(2r'¦Õ'+r¦Õ'')=0

r2¦Õ'
S=(1/2)r2¦Õ'
dS/dt={(1/2)r2¦Õ'}'=rr'¦Õ'+(1/2)r2¦Õ''
r'¦Õ'+(1/2)r¦Õ''=0(a)
d¦Õ/dt=hu^2
{(d^2u)/(d¦Õ^2)}=f(1/u)/(h^2u^2)
r=1/u=L/{1+ecos(¦Õ-¦Õ)}
r=L/{1+ecos(¦Õ-¦Õ)}


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r'=-[Lesin(¦Õ-¦Õ)/{1+ecos(¦Õ-¦Õ)}^2]¦Õ'
(-[Lesin(¦Õ-¦Õ)/{1+ecos(¦Õ-¦Õ)}^2](¦Õ')^2+(1/2)[L/{1+ecos(¦Õ-¦Õ)}]¦Õ'')=0
(-[esin(¦Õ-¦Õ)/{1+ecos(¦Õ-¦Õ)}](¦Õ')^2+(1/2)¦Õ'')=0
(-[esin(¦Õ-¦Õ)/{1+ecos(¦Õ-¦Õ)}](d¦Õ/dt)^2+(1/2)d(d¦Õ/dt)/dt)=0
[esin(¦Õ-¦Õ)/{1+ecos(¦Õ-¦Õ)}](d¦Õ/dt)d¦Õ+(1/2)d(d¦Õ/dt)=0
elog{1+ecos(¦Õ-¦Õ)}(d¦Õ/dt)-elog{1+ecos(¦Õ-¦Õ)}{d(d¦Õ/dt)/d¦Õ}d¦Õ+(1/2)d¦Õ/dt=0
elog{1+ecos(¦Õ-¦Õ)}(d¦Õ/dt)-elog{1+ecos(¦Õ-¦Õ)}d(d¦Õ/dt)+(1/2)d¦Õ/dt=0
t=log{1+ecos(¦Õ-¦Õ)}
d¦Õ/dt=1/(dt/d¦Õ)={1+ecos(¦Õ-¦Õ)}/{-esin(¦Õ-¦Õ)}
[elog{1+ecos(¦Õ-¦Õ)}+(1/2)](d¦Õ/dt)-e¢élog{1+ecos(¦Õ-¦Õ)}d[{1+ecos(¦Õ-¦Õ)}/{-esin(¦Õ-¦Õ)}]=0
¢éf(x)d{f¡Ç(x)}=f(x) f¡Ç(x)
¢éf(x)d{f¡Ç(x)}=¢éf(x)d{df(x)/dx}=(d/dx){¢éf(x)df(x)}=(d/dx){f(x)^2/2}=f(x)f¡Ç(x)
elog{1+ecos(¦Õ-¦Õ)}[{1+ecos(¦Õ-¦Õ)}/{-esin(¦Õ-¦Õ)}]
[elog{1+ecos(¦Õ-¦Õ)}+(1/2)](d¦Õ/dt)=elog{1+ecos(¦Õ-¦Õ)}[{1+ecos(¦Õ-¦Õ)}/{-esin(¦Õ-¦Õ)}]
[-esin(¦Õ-¦Õ)/{1+ecos(¦Õ-¦Õ)}d¦Õ+(1/2)[-esin(¦Õ-¦Õ)/{1+ecos(¦Õ-¦Õ)}][1/elog{1+ecos(¦Õ-¦Õ)}]d¦Õ=dt]
t=log{1+ecos(¦Õ-¦Õ)}+(1/2)¢é[log{1+ecos(¦Õ-¦Õ)}[1/elog{1+ecos(¦Õ-¦Õ)}]-
(1/2)log{1+ecos(¦Õ-¦Õ)}[log^-2{1+ecos(¦Õ-¦Õ)}]{(-e)sin(¦Õ-¦Õ)/1+ecos(¦Õ-¦Õ)}}]d¦Õ
=log{1+ecos(¦Õ-¦Õ)}+(1/2)¢é[log^-1{1+ecos(¦Õ-¦Õ)}]{(-e)sin(¦Õ-¦Õ)/{1+ecos(¦Õ-¦Õ)}}]d¦Õ
¢é{f'(x)/f(x)}dx=logf(x)
t=(3/2)log{1+ecos(¦Õ-¦Õ)}
t=log{1+ecos(¦Õ-¦Õ)}


t=log(L/r)

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(xb¡¢yb)=(rbcos¦Õb¡¢rbsin¦Õb)
mbdVxb/dt=fxb=f(rb)cos¦Õb
mbdVyb/dt=fyb=f(rb)sin¦Õb
Vxb=dxb/dt=rb'cos¦Õb-rb¦Õb'sin¦Õb
Vyb=dyb/dt=rb'sin¦Õb+rb¦Õb'cos¦Õb

¦Áxb
¦Áxb=dVxb/dt
¦Áxb=rb''cos¦Õb–rb'¦Õb'sin¦Õb–rb'(¦Õb'sin¦Õb)–rb(¦Õb'sin¦Õa)'
¦Áxb=rb''cos¦Õb–rb'¦Õb'sin¦Õb–rb'(¦Õb'sin¦Õb)–rb(¦Õb''sin¦Õb+(¦Õb')2cos¦Õb)
¦Áxb=rb''cos¦Õb–rb'¦Õb'sin¦Õb–rb'¦Õb'sin¦Õb–rb'¦Õb'sin¦Õb–rb(¦Õb')2cos¦Õb
¦Áxb=r'b'cos¦Õb-2rb'¦Õb'sin¦Õb–rb'¦Õb'sin¦Õb–rb(¦Õb')2cos¦Õb

¦Áyb
¦Áyb=dVyb/dt
¦Áyb=rb''sin¦Õb+rb'¦Õb'cos¦Õb+rb'(¦Õb'cos¦Õb)+rb(¦Õb'cos¦Õb)'
¦Áyb=rb''sin¦Õb+rb'¦Õb'cos¦Õb+rb'¦Õb'cos¦Õb+rb(¦Õb''cos¦Õb-(¦Õb')2sin¦Õb)
¦Áyb=rb''sin¦Õb+rb'¦Õb'cos¦Õb+rb'¦Õb'cos¦Õb+rb'¦Õb'cos¦Õb–rb(¦Õb')2sin¦Õb
¦Áyb=rb''sin¦Õb+2rb'¦Õb'cos¦Õb+rb'¦Õb'cos¦Õb–rb(¦Õb')2sin¦Õb

cos¦Õb+sin¦Õb=mb(cos¦ÕbŽ¥dVxb/dt+sin¦ÕbŽ¥dVyb/dt)=(sin2¦Õb+cos2¦Õb)f(rb)=f(rb)
cos¦ÕbdVxb/dt+sin¦ÕbdVyb/dt=f(rb)/mb

sin¦Õb–cos¦Õb=mb(sin¦ÕbŽ¥dVxb/dt+cos¦ÕbŽ¥dVyb/dt)=cos¦Õbsin¦Õbf(rb)-sin¦Õbcos¦Õbf(rb)=0


cos¦Õbrb''cos¦Õb–2rb'¦Õb'sin¦Õb–rb'¦Õb'sin¦Õb-rb(¦Õb')2cos¦Õb}+
sin¦Õ{brb''sin¦Õb+2rb'¦Õb'cos¦Õb+rb'¦Õb'cos¦Õb–rb(¦Õb')2sin¦Õb¡Ñ
=rb''–rb(¦Õb')2=f(rb)/m
mb{rb''–rb(¦Õb')2}=f(rb)

sin¦Õb{rb''cos¦Õb - 2rb'¦Õb'sin¦Õb – rb'¦Õb'sin¦Õb – rb(¦Õb')2cos¦Õb¡Ñ
(-cos¦Õb){rb''sin¦Õb+2rb'¦Õb'cos¦Õb+rb'¦Õb'cos¦Õb – rb(¦Õb')2sin¦Õb¡Ñ
=2rb'¦Õb'+rb¦Õb''=0

mb(2rb'¦Õb'+rb¦Õb'')=0

mb¡Ðrb'' – rb(¦Õb')2¡Ñ=f(rb)¡Ä­¥
mb(2rb'¦Õb'+rb¦Õb'')=0¡Ä­¦

rb2¦Õb'

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