$${\begin{align*} F_k = \frac{J}{\Delta t} &= \frac{4,13 \times 10^2 \, \mathrm{N \cdot s}}{0,27\, \mathrm{s}} \\&= \underline{\underline{1,5 \times 10^3 \, \mathrm{N}}}\end{align*}}$$