0.01 0.1 1 10 100 1000 k$_{c}$R$_{2}$$^{2}$/D$_{1}$ 0 1 2 3 4  k B T / D eff FDT F=3.0 k$_{B}$T/R$_{1}$ F=7.0 k$_{B}$T/R$_{1}$ Figure 11: Γ k$_{B}$T D eff versus the dimensionless ratio k$_{c}$R 2 $_{2}$/D$_{1}$ , for a chucker with R$_{1}$/R$_{2}$ = 10 . D$_{eff}$ is measured from the mean square displacement of a freely diffusing chucker (Figure 5) whereas Γ is obtained by dragging the chucker with an external force of F = 3 . 0 k$_{B}$T/R$_{1}$ or F = 7 . 0 k$_{B}$T/R$_{1}$ (Figure 10). The dashed line indicates the FDT prediction for a passive system. 31