Outflow mass-loss rate Ṁ_out (left), kinetic power ratio (centre) and momentum rate ratio (Ṁ_outv) / (L_AGN/c) (right) as a function of the dynamical time scale of the clumps in outflow. These plots have been obtained by dividing the outflowing clumps (see Sect. 3.4) in bins of Δlog (τ_dyn) = 0.15. The plots show, in correspondence of the average τ_dyn of each bin, the total Ṁ_out, and (Ṁ_outv) / (L_AGN/c) obtained by adding up the contribution of all the outflowing clumps within the bin. The error bars in the x direction indicate the bin size, i.e. Δx = ± 0.075. The error bars in the y direction are calculated using the statistical error propagation (i.e. by propagating the errors on v, R and on the [C ii] fluxes measured for each clump in outflow, which are estimated in Appendix C). The errors do not take into account the uncertainty on the conversion from [C ii] luminosity to atomic gas mass and the uncertainty on the AGN luminosity estimate (Schneider et al. 2014).