  We rigorously show a large friction limit of hydrodynamic models with
alignment, attractive, and repulsive effects. More precisely, we consider
pressureless Euler equations with nonlocal forces and provide a quantitative
estimate of large friction limit to a continuity equation with nonlocal
velocity fields, which is often called an aggregation equation. Our main
strategy relies on the relative entropy argument combined with the estimate of
$p$-Wasserstein distance between densities.
