A 75 kg meteorite buries itself 5.0m into soft mud. The force between the meteorite and the mud is given by F(x) = (640 N/m^3)x^3, where x is the…

A 75 kg meteorite buries itself 5.0m into soft mud. The force between the meteorite and the mud is given by F(x) = (640 N/m^3)x^3, where x is the depth in the mud. What was the speed of the meteorite when it initially impacted the mud?