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m=0.2\ \mathrm{kg}, h=10\ \mathrm{m}, b=0.4\ \mathrm{kg/s}, g=9.8\ \mathrm{m/s^2}
k=\frac{b}{m}=\frac{0.4}{0.2}=2\ \text{s}^{-1}.
v(t)=\frac{g}{k}\big(1-e^{-kt}\big).
y(t)=\int_0^t v(t')\ dt'=\frac{g}{k}t+\frac{g}{k^2}\big(e^{-kt}-1\big).
= \frac{g}{k}t+\frac{g}{k^2}\big(e^{-kt}-1\big)=h.
m=0.2\ \mathrm{kg}, h=10\ \mathrm{m}, b=0.4\ \mathrm{kg/s}, g=9.8\ \mathrm{m/s^2}