加速度 a=dv/dt =-bv;
dv/v=-b dt;
log(v)=c-bt;
v=exp(c-bt);
当t=0, v=sqrt(2gh/m); 所以exp(c)=sqrt(2gh/m)=v0;
v=v0*exp(-bt)==dy/dt;
dy=v0*exp(-bt)dt;
y=-v0/b *exp(-bt)+y0;
当t=0, y=0, 所以y0=v0/b;
y=v0/b(1-exp(-bt));
y=v0/b-v/b=(v0-v)/b;
v=v0+yb
加速度 a=dv/dt =-bv;
dv/v=-b dt;
log(v)=c-bt;
v=exp(c-bt);
当t=0, v=sqrt(2gh/m); 所以exp(c)=sqrt(2gh/m)=v0;
v=v0*exp(-bt)==dy/dt;
dy=v0*exp(-bt)dt;
y=-v0/b *exp(-bt)+y0;
当t=0, y=0, 所以y0=v0/b;
y=v0/b(1-exp(-bt));
y=v0/b-v/b=(v0-v)/b;
v=v0+yb
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牛!顿首
-爪四哥-
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03/06/2021 postreply
12:14:56
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Correction
-newton123-
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(2729 bytes)
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03/06/2021 postreply
20:38:40
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