v=−ˆv+(v0+ˆv)e−γt The second time integral (obtained by writing v as dydt in Equation 6.3.25) and the spa...\boldsymbol{v = -\hat{v} + (v_{0}+\hat{v})e^{- \gamma t} \tag{6.3.25}\label{eq:6.3.25}} The second time integral (obtained by writing v as dydt in Equation 6.3.25) and the space integral (obtained by writing ¨y as vdvdy in the equation of motion) require some patience, but the results are v=v0−γy−ˆvln(ˆv+v0ˆv+v).