Compute the retarding force of water on the whale, based on a drag law
\((1/2)*rho*Cw*A*vw^2\)
where rho is 1024 (kg/m^3), Cw is parms$Cw and
A is parms$Sw.
whaleWaterForce(vw, parms)Whale velocity (m/s).
A named list holding model parameters, created by
parameters().
Water drag force (N).