a(t)=v'(t)=[ka(t)]'=ka'(t)
[lna(t)]'=a'(t)/a(t)=1/k
a(t)=e^(t/k)
v(t)=ke^(t/k)
s=∫v(t)dt=k^2[e^(t/k)-1]
t=kln(s/k^2+1)
v=s/k+k
a(t)=v'(t)=[ka(t)]'=ka'(t)
[lna(t)]'=a'(t)/a(t)=1/k
a(t)=e^(t/k)
v(t)=ke^(t/k)
s=∫v(t)dt=k^2[e^(t/k)-1]
t=kln(s/k^2+1)
v=s/k+k