关于matlab (如下),第七行和第八行的是什么意思,括号里面的式子是怎么的出来的,可以去掉这两行吗?v=dsolve('m*D2v+2*k*v*Dv=0','v(0)=0,Dv(0)=g','t')x=dsolve('m*g-k*(Dx)^2=m*D2x','x(0)=0,Dx(0)=0,D2x(0)=g','t')m=75;k=
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![关于matlab (如下),第七行和第八行的是什么意思,括号里面的式子是怎么的出来的,可以去掉这两行吗?v=dsolve('m*D2v+2*k*v*Dv=0','v(0)=0,Dv(0)=g','t')x=dsolve('m*g-k*(Dx)^2=m*D2x','x(0)=0,Dx(0)=0,D2x(0)=g','t')m=75;k=](/uploads/image/z/15222616-16-6.jpg?t=%E5%85%B3%E4%BA%8Ematlab+%EF%BC%88%E5%A6%82%E4%B8%8B%EF%BC%89%2C%E7%AC%AC%E4%B8%83%E8%A1%8C%E5%92%8C%E7%AC%AC%E5%85%AB%E8%A1%8C%E7%9A%84%E6%98%AF%E4%BB%80%E4%B9%88%E6%84%8F%E6%80%9D%2C%E6%8B%AC%E5%8F%B7%E9%87%8C%E9%9D%A2%E7%9A%84%E5%BC%8F%E5%AD%90%E6%98%AF%E6%80%8E%E4%B9%88%E7%9A%84%E5%87%BA%E6%9D%A5%E7%9A%84%2C%E5%8F%AF%E4%BB%A5%E5%8E%BB%E6%8E%89%E8%BF%99%E4%B8%A4%E8%A1%8C%E5%90%97%3Fv%3Ddsolve%28%27m%2AD2v%2B2%2Ak%2Av%2ADv%3D0%27%2C%27v%280%29%3D0%2CDv%280%29%3Dg%27%2C%27t%27%29x%3Ddsolve%28%27m%2Ag-k%2A%28Dx%29%5E2%3Dm%2AD2x%27%2C%27x%280%29%3D0%2CDx%280%29%3D0%2CD2x%280%29%3Dg%27%2C%27t%27%29m%3D75%3Bk%3D)
关于matlab (如下),第七行和第八行的是什么意思,括号里面的式子是怎么的出来的,可以去掉这两行吗?v=dsolve('m*D2v+2*k*v*Dv=0','v(0)=0,Dv(0)=g','t')x=dsolve('m*g-k*(Dx)^2=m*D2x','x(0)=0,Dx(0)=0,D2x(0)=g','t')m=75;k=
关于matlab (如下),第七行和第八行的是什么意思,括号里面的式子是怎么的出来的,可以去掉这两行吗?
v=dsolve('m*D2v+2*k*v*Dv=0','v(0)=0,Dv(0)=g','t')
x=dsolve('m*g-k*(Dx)^2=m*D2x','x(0)=0,Dx(0)=0,D2x(0)=g','t')
m=75;
k=0.22;
g=9.8
t=0:0.5:30;
v =tanh(t.*(g*m*k)^(1/2)/m)*(g*m*k)^(1/2)/k
x=(m/k)*log(cosh(t.*(k*g/m)^1/2))
plot(t,v),gtext('v(t)')
hold on
plot(t,x),gtext('x(t)')
关于matlab (如下),第七行和第八行的是什么意思,括号里面的式子是怎么的出来的,可以去掉这两行吗?v=dsolve('m*D2v+2*k*v*Dv=0','v(0)=0,Dv(0)=g','t')x=dsolve('m*g-k*(Dx)^2=m*D2x','x(0)=0,Dx(0)=0,D2x(0)=g','t')m=75;k=
v =tanh(t.*(g*m*k)^(1/2)/m)*(g*m*k)^(1/2)/k
x=(m/k)*log(cosh(t.*(k*g/m)^1/2))是v=dsolve('m*D2v+2*k*v*Dv=0','v(0)=0,Dv(0)=g','t')
x=dsolve('m*g-k*(Dx)^2=m*D2x','x(0)=0,Dx(0)=0,D2x(0)=g','t')解算出来的,这个程序的原意是想得到x和v的函数式,再通过m=75;
k=0.22;
g=9.8
t=0:0.5:30;进行描点画线plot(t,v),gtext('v(t)')
hold on
plot(t,x),gtext('x(t)')
你好,那你能告诉我这个程序最后要加个啥东西啊??